Display panel, preparation method thereof and display device

Abstract

A display panel comprises a first substrate and a second substrate arranged oppositely, wherein: the first substrate comprises a first substrate and a driving structure layer, a light-emitting structure layer, an encapsulation structure layer and a first quantum dot layer arranged in sequence on the side of the first substrate close to the second substrate, the first quantum dot layer comprises a first red quantum dot layer and a first green quantum dot layer; the second substrate comprises a second substrate and a second quantum dot layer arranged on the side of the second substrate close to the first substrate, the second quantum dot layer comprises a second red quantum dot layer and a second green quantum dot layer; the orthographic projection of the first red quantum dot layer on the first substrate and the orthographic projection of the second red quantum dot layer on the first substrate have an overlapping area; the orthographic projection of the first green quantum dot layer on the first substrate and the orthographic projection of the second green quantum dot layer on the first substrate have an overlapping area.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] Quantum dot organic light-emitting display (QD-OLED) devices offer a wider color gamut, higher brightness, and lower power consumption compared to the currently mainstream organic light-emitting display (OLED) technology, and are gradually gaining popularity among consumers. Currently, mature QD-OLED products on the market typically use multi-layered OLEDs with blue light as the backlight. The quantum dot components in the photoresist or ink are excited by the blue backlight to emit red or green light, achieving the emission of the three primary colors: red, green, and blue.

[0003] Although QD-OLED has these advantages, the use of blue backlight in current QD-OLED products on the market results in low red light efficiency, affecting the product's luminous quality. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this disclosure. This overview is not intended to limit the scope of the claims.

[0005] This disclosure provides a display panel, including: a first substrate and a second substrate disposed opposite to each other, wherein: the first substrate includes a first substrate and a driving structure layer, a light-emitting structure layer, an encapsulation structure layer and a first quantum dot layer sequentially stacked on the side of the first substrate near the second substrate, the first quantum dot layer including a first red quantum dot layer and a first green quantum dot layer; the second substrate includes a second substrate and a second quantum dot layer disposed on the side of the second substrate near the first substrate, the second quantum dot layer including a second red quantum dot layer and a second green quantum dot layer; the orthographic projection of the first red quantum dot layer on the first substrate and the orthographic projection of the second red quantum dot layer on the first substrate have an overlapping region; the orthographic projection of the first green quantum dot layer on the first substrate and the orthographic projection of the second green quantum dot layer on the first substrate also have an overlapping region.

[0006] Optionally, the orthographic projection of the first red quantum dot layer on the first substrate covers the orthographic projection of the second red quantum dot layer on the first substrate; the orthographic projection of the first green quantum dot layer on the first substrate covers the orthographic projection of the second green quantum dot layer on the first substrate.

[0007] Optionally, the thickness of the first red quantum dot layer in the direction perpendicular to the display panel is greater than the thickness of the second red quantum dot layer in the direction perpendicular to the display panel; the thickness of the first green quantum dot layer in the direction perpendicular to the display panel is greater than the thickness of the second green quantum dot layer in the direction perpendicular to the display panel.

[0008] Optionally, the thickness of the first red quantum dot layer in the direction perpendicular to the display panel is between 5 μm and 15 μm, and the thickness of the first green quantum dot layer in the direction perpendicular to the display panel is between 5 μm and 15 μm.

[0009] The second red quantum dot layer has a thickness of 2µm to 5µm in the direction perpendicular to the display panel, and the second green quantum dot layer has a thickness of 2µm to 5µm in the direction perpendicular to the display panel.

[0010] Optionally, the first substrate further includes a separator layer and a first light-transmitting layer; the separator layer includes a plurality of separator portions extending along a second direction, the plurality of separator portions being arranged sequentially along a first direction, and the first red quantum dot layer, the second green quantum dot layer and the first light-transmitting layer being located in the interval region between two adjacent separator portions.

[0011] Optionally, the second substrate further includes a color resist layer and a second light-transmitting layer; the color resist layer is in the form of a grid and has multiple color resist layer openings, and the second red quantum dot layer, the second green quantum dot layer and the second light-transmitting layer are respectively located in one color resist layer opening.

[0012] Optionally, the color resist layer includes a plurality of first color resist portions extending along a first direction, and the plurality of first color resist portions are arranged sequentially in a second direction; the color resist layer also includes a plurality of groups of second color resist portions, each group of second color resist portions including a plurality of second color resist portions located between two adjacent first color resist portions and spaced apart along the first direction, and each second color resist portion extending along the second direction.

[0013] Optionally, the projection of the first color resist on the first substrate overlaps with the projections of the adjacent first red quantum dot layer and the first green quantum dot layer on the first substrate; the projection of the first color resist on the first substrate overlaps with the projections of the adjacent first green quantum dot layer and the first light-transmitting layer on the first substrate; and the projection of the first color resist on the first substrate overlaps with the projections of the adjacent first red quantum dot layer and the first light-transmitting layer on the first substrate.

[0014] Optionally, the projection of the first color resist on the first substrate and the projection of the separator layer on the first substrate both overlap.

[0015] Optionally, the display panel includes a plurality of pixel units arranged in an array, each pixel unit including a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the second substrate further includes a color filter layer; the color filter layer includes a red filter unit and a green filter unit, the red filter unit and the second red quantum dot layer being located within the color resist layer opening of the corresponding red sub-pixel, the green filter unit and the second green quantum dot layer being located within the color resist layer opening of the corresponding green sub-pixel, the red filter unit being located on the side of the second red quantum dot layer closer to the second substrate, and the green filter unit being located on the side of the second green quantum dot layer closer to the second substrate.

[0016] Optionally, the display panel includes a plurality of pixel units arranged in an array, the pixel units including red sub-pixels, green sub-pixels and blue sub-pixels, and the second substrate further includes a color filter layer;

[0017] The color filter layer includes a red filter unit and a green filter unit. The red filter unit and the second red quantum dot layer are located within the color resist layer opening of the corresponding red sub-pixel. The green filter unit and the second green quantum dot layer are located within the color resist layer opening of the corresponding green sub-pixel. The red filter unit is located on the side of the second red quantum dot layer away from the second substrate, and the green filter unit is located on the side of the second green quantum dot layer away from the second substrate.

[0018] This disclosure also provides a display device, including a display panel as described in any embodiment of this disclosure.

[0019] This disclosure also provides a method for manufacturing a display panel, comprising:

[0020] A first substrate and a second substrate are formed respectively. The first substrate includes a first substrate and a driving structure layer, a light-emitting structure layer, an encapsulation structure layer and a first quantum dot layer sequentially stacked on the side of the first substrate near the second substrate. The first quantum dot layer includes a first red quantum dot layer and a first green quantum dot layer. The second substrate includes a second substrate and a second quantum dot layer disposed on the side of the second substrate near the first substrate. The second quantum dot layer includes a second red quantum dot layer and a second green quantum dot layer.

[0021] When the first substrate and the second substrate are aligned, there is an overlapping area between the orthographic projection of the first red quantum dot layer on the first substrate and the orthographic projection of the second red quantum dot layer on the first substrate; there is also an overlapping area between the orthographic projection of the first green quantum dot layer on the first substrate and the orthographic projection of the second green quantum dot layer on the first substrate.

[0022] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0023] The accompanying drawings are used to provide an understanding of the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0024] Figure 1 This is a schematic diagram of a planar structure of a display panel provided in an embodiment of the present disclosure;

[0025] Figures 2A to 2C Schematic diagrams of three cross-sectional structures of the display panel provided in embodiments of this disclosure;

[0026] Figure 3A A schematic diagram of a planar structure of the partition layer provided in an embodiment of this disclosure;

[0027] Figure 3B A schematic diagram of printing a first quantum dot layer of ink in the spacer region between adjacent partitions;

[0028] Figures 4A to 4B Two other cross-sectional structural diagrams of the display panel provided in embodiments of this disclosure;

[0029] Figure 5 This is a schematic diagram of the planar structure of the color resist layer in the display panel provided in an embodiment of the present disclosure;

[0030] Figure 6 This is a schematic cross-sectional view of a first substrate provided in an embodiment of the present disclosure;

[0031] Figures 7A to 7C These are schematic diagrams of three cross-sectional structures of the second substrate provided in the embodiments of this disclosure. Detailed Implementation

[0032] The embodiments will now be described with reference to the accompanying drawings. Note that the embodiments can be implemented in many different forms. Those skilled in the art will readily understand that the methods and content can be varied in many ways without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be construed as being limited to the contents described in the following embodiments.

[0033] In the accompanying drawings, the size of the constituent elements, the thickness of the layers, or the area are sometimes exaggerated for clarity. Therefore, one aspect of this disclosure is not necessarily limited to these dimensions, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and one aspect of this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0034] The ordinal numbers “first,” “second,” and “third” used in this specification are used to avoid confusion among the constituent elements, not to limit their quantity.

[0035] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of each constituent element being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0036] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection via an intermediate component; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.

[0037] In this specification, a transistor is a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain electrode) and the source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0038] In this specification, "parallel" refers to the state where the angle formed by two straight lines is greater than or equal to -10° and less than 10°, and therefore also includes the state where the angle is greater than or equal to -5° and less than 5°. Similarly, "perpendicular" refers to the state where the angle formed by two straight lines is greater than or equal to 80° and less than 100°, and therefore also includes the state where the angle is greater than or equal to 85° and less than 95°.

[0039] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer."

[0040] Figure 1 This is a schematic diagram of the pixel arrangement structure of a display panel according to an embodiment of the present disclosure. In some exemplary embodiments, such as Figure 1 As shown, the display panel includes a display area 100 and a non-display area 200 surrounding the display area 100. The display area 100 includes a plurality of pixel units P arranged in an array along a first direction X and a second direction Y. Each pixel unit P includes a plurality of sub-pixels. For example, each pixel unit P may include three sub-pixels arranged side-by-side along the first direction X (also known as the row direction): a first sub-pixel P1 emitting a first color light (e.g., red light), a second sub-pixel P2 emitting a second color light (e.g., green light), and a third sub-pixel P3 emitting a third color light (e.g., blue light). With a plurality of pixel units P arranged sequentially along the first direction X, multiple sub-pixels located in the same column along the second direction Y (also known as the column direction) can emit light of the same color. The first direction X intersects the second direction Y; for example, the first direction X and the second direction Y may be perpendicular to each other. The multiple sub-pixels emitting light of the same color can be referred to as sub-pixels of the same color. In other embodiments, each pixel unit P may also include sub-pixels emitting other colors of light. The embodiments disclosed herein do not limit the pixel arrangement of the display panel or the type and number of sub-pixels contained in each pixel unit.

[0041] Figures 2A to 2C for Figure 1 Schematic diagrams of three cross-sectional structures of the display panel. In some exemplary embodiments, such as Figures 2A to 2C As shown, the display panel may include a first substrate 1 and a second substrate 2 disposed opposite to each other. The first substrate 1 and the second substrate 2 may be bonded together by an organic adhesive layer 3. The first substrate 1 may include a first substrate 10 and a driving structure layer 11, a light-emitting structure layer 12 and an encapsulation structure layer 13 sequentially stacked on the first substrate 10. In addition, the first substrate 1 may also include a first quantum dot layer and a separator layer 14 disposed on the side of the encapsulation structure layer 13 away from the first substrate 10.

[0042] The driving structure layer 11 may include a pixel driving circuit (schematically showing a transistor and a capacitor) disposed on the first substrate 10, and a planarization layer 111 disposed on the side of the pixel driving circuit away from the first substrate 10. The planarization layer 111 has a first via K1, which is configured to connect the subsequently formed first electrode 121 to the pixel driving circuit. The pixel driving circuit may include multiple thin-film transistors (T) and storage capacitors (C). The pixel driving circuit may be a 3T1C, 4T1C, 5T1C, 5T2C, 6T1C, or 7T1C structure, etc., and this embodiment does not limit this. The driving structure layer 11 may also include multiple data lines (not shown in the figure) and multiple gate lines (not shown in the figure), as well as other signal lines (not shown in the figure).

[0043] The light-emitting structure layer 12 may include a first electrode layer, a pixel defining layer 122, a light-emitting functional layer 123, and a second electrode layer. The first electrode layer may include a plurality of first electrodes 121 disposed on the driving structure layer 11. The first electrodes 121 are connected to the pixel driving circuit through a first via K1 disposed on the planarization layer 111. The second electrode layer includes a second electrode 124. Exemplarily, the pixel driving circuit may include a connection electrode configured to be connected to the first electrode 121. The first via K1 disposed on the planarization layer 111 exposes the connection electrode. The first electrode 121 is disposed on the surface of the planarization layer 111 away from the first substrate 10 and is connected to the connection electrode through the first via K1.

[0044] A pixel defining layer 122 is disposed on the side of the plurality of first electrodes 121 away from the first substrate 10 and has a plurality of pixel openings. Each pixel opening exposes the surface of a corresponding first electrode 121 facing away from the first substrate 10. A light-emitting functional layer 123 may be disposed within the pixel opening. The light-emitting functional layer 123 includes an organic light-emitting layer (i.e., a light-emitting material layer), and may further include one or more film layers selected from a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. At least one film layer in the light-emitting functional layer 123 (e.g., a hole injection layer, a hole transport layer, and an organic light-emitting layer) may be fabricated using an inkjet printing process. A second electrode 124 is disposed on the side of the light-emitting functional layer 123 away from the first substrate 10. The first electrodes 121, the light-emitting functional layer 123, and the second electrode 124 are stacked sequentially to form a light-emitting device, which may be an OLED device. Each sub-pixel includes a light-emitting device and a pixel driving circuit connected to the light-emitting device. The light-emitting device emits light under the drive of the pixel driving circuit. In this embodiment, the light-emitting device of each sub-pixel can emit blue light or blue-green light. In some exemplary embodiments, the first electrode 121 can be the anode of the light-emitting device, and the second electrode 124 can be the cathode of the light-emitting device. The light-emitting device can be a top-emitting device. The light-emitting device of each sub-pixel emits blue light or blue-green light toward the encapsulation structure layer 13.

[0045] The encapsulation structure layer 13 may include multiple stacked inorganic material layers, or it may include a first inorganic material layer, an organic material layer, and a second inorganic material layer sequentially stacked along a direction away from the first substrate 10. The materials of the first and second inorganic material layers may include any one or more of silicon nitride, silicon oxide, and silicon oxynitride. The material of the organic material layer may be a resin.

[0046] like Figures 2A to 2CAs shown, the first quantum dot layer includes a first red quantum dot layer QD-R1, a first green quantum dot layer QD-G1, and a first light-transmitting layer 151. The first red quantum dot layer QD-R1 has an overlapping region with the orthographic projection of the light-emitting device of the red sub-pixel on the first substrate 10. The first red quantum dot layer QD-R1 is configured to convert the blue or blue-green light emitted by the light-emitting device of the corresponding red sub-pixel into red light. Similarly, the first green quantum dot layer QD-G1 has an overlapping region with the orthographic projection of the light-emitting device of the green sub-pixel on the first substrate 10. The first green quantum dot layer QD-G1 is configured to convert the blue or blue-green light emitted by the light-emitting device of the corresponding green sub-pixel into green light. The first light-transmitting layer 151 has an overlapping region with the orthographic projection of the blue sub-pixel on the first substrate 10. The first light-transmitting layer 151 is configured to transmit the blue or blue-green light emitted by the light-emitting device of the corresponding blue sub-pixel.

[0047] The red quantum dots in the first red quantum dot layer QD-R1 convert blue or blue-green light into red light so that the red sub-pixels display red; the green quantum dots in the first green quantum dot layer QD-G1 convert blue or blue-green light into green light so that the green sub-pixels display green; the first light-transmitting layer 151 is able to transmit blue or blue-green light.

[0048] For the blue sub-pixel, since the light emitted by the blue OLED device is itself blue or blue-green light, there is no need to set up a blue quantum dot layer; instead, a first light-transmitting layer 151 is used. The first light-transmitting layer 151 can be an air layer or a transparent material layer. For example, the first light-transmitting layer 151 can be a transparent polymer resin material, such as acrylic. To further improve the light extraction efficiency of the blue sub-pixel, reflective particles capable of reflecting blue light towards the light-emitting surface can be added to the transparent material layer.

[0049] When the light emitted by the light-emitting device of the sub-pixel is blue-green light, the second light-transmitting layer 221 on the second substrate 2 can be replaced with a blue light-filtering unit layer 222. Alternatively, the first light-transmitting layer 151 on the first substrate 1 can be replaced with a blue light-filtering unit layer. The green light portion of the blue-green light is filtered out by the blue light-filtering unit layer provided on the first substrate 1 and / or the second substrate 2, thereby making the blue sub-pixel display blue.

[0050] In some exemplary embodiments, such as Figure 3A As shown, the separating layer 14 includes multiple separating portions extending along the second direction Y, and these multiple separating portions are arranged sequentially along the first direction X. Since sub-pixels in the same column along the second direction Y are sub-pixels of the same color, and sub-pixels in adjacent columns are sub-pixels of different colors, therefore, as... Figure 3BAs shown, when inkjet printing forms the first red quantum dot layer QD-R1 and the first green quantum dot layer QD-G1, the ink of the first red quantum dot layer QD-R1 and the ink of the first green quantum dot layer QD-G1 can flow in the interval area between two adjacent partitions. The partitions can be used to prevent the quantum dot layer ink of the same column of sub-pixels from climbing to the adjacent column of sub-pixels. Here, 51 and 52 are the first red quantum dot layer QD-R1 ink and the first green quantum dot layer QD-G1 ink of the red sub-pixel, respectively.

[0051] In some exemplary embodiments, the material of the separator layer 14 may be a transparent insulating material. For example, the material of the separator layer 14 may include one or more of the following: optically transparent resin, optically transparent adhesive, polyimide, acrylic ink, and other planarization layer materials.

[0052] In some exemplary embodiments, the thickness of the separator layer 14 in the direction perpendicular to the substrate is between 5 and 15 μm.

[0053] In some other exemplary embodiments, at least some pixel units may include red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels (not shown in the figures).

[0054] In some exemplary implementations, such as Figure 4A As shown, the first quantum dot layer may further include a first yellow quantum dot layer QD-Y1. The orthographic projection of the first yellow quantum dot layer QD-Y1 on the first substrate 10 overlaps with the orthographic projection of the white sub-pixel (not shown) on the first substrate 10. The quantum dots of the first yellow quantum dot layer QD-Y1 can convert part of the blue or blue-green light emitted by the light-emitting device of the corresponding white sub-pixel into yellow light, and can also transmit another part of the blue or blue-green light, so that the converted yellow light and the transmitted blue or blue-green light are mixed into white light, making the white sub-pixel display white. This realizes RGBW four-color display, greatly improving the color richness and display brightness, and enabling the production of panels with higher resolution. Moreover, the display panel does not need to set a blue light filter on the white sub-pixel, improving the utilization rate of blue backlight and simplifying the manufacturing process.

[0055] In other exemplary embodiments, such as Figure 4BAs shown, the first quantum dot layer may further include a first yellow quantum dot layer. The orthographic projection of the first yellow quantum dot layer on the first substrate 10 overlaps with the orthographic projection of the white sub-pixel on the first substrate 10. The first yellow quantum dot layer may include a third red quantum dot layer QD-R3 and a third green quantum dot layer QD-G3 stacked sequentially along the direction away from the first substrate 10. That is, the third red quantum dot layer QD-R3 is disposed on the side of the blue OLED device away from the first substrate 10, and the third green quantum dot layer QD-G3 is disposed on the side of the third red quantum dot layer QD-R3 away from the blue OLED device. In a blue OLED device, light is first irradiated onto the third red quantum dot layer (QD-R3) from bottom to top. Since the conversion efficiency is not 100%, the third red quantum dot layer (QD-R3) converts some blue or blue-green light into red light, while allowing another portion of blue or blue-green light to pass through. The third green quantum dot layer (QD-G3) converts some of the blue or blue-green light that has passed through the third red quantum dot layer (QD-R3) into green light, and also allows another portion of blue or blue-green light that has not been converted by the third red quantum dot layer (QD-R3) to pass through. Simultaneously, because the energy of emitted red light is lower than the excitation energy of the green quantum dots, the third green quantum dot layer does not convert it into green light, but allows red light to pass through. Finally, the red and green light converted by the two quantum dot layers mix to form yellow light, and the yellow light mixes with the blue light that has not been converted by the two quantum dot layers to form white light, which is then emitted.

[0056] In some exemplary embodiments, such as Figure 4B As shown, the sum of the thicknesses of the third green quantum dot layer QD-G3 and the third red quantum dot layer QD-R3 is at least equal to the thickness of one of the first red quantum dot layer QD-R1, the first green quantum dot layer QD-G1, and the first light-transmitting layer 151, to ensure the flatness of the organic adhesive layer 3. In this embodiment, the "thickness" of a certain film layer refers to the distance between the surface of the film layer away from the first substrate and the surface of the film layer near the first substrate in a direction perpendicular to the display panel. In some exemplary embodiments, such as Figure 4B As shown, the thicknesses of the third green quantum dot layer QD-G3 and the third red quantum dot layer QD-R3 can be equal or unequal. For example, the thickness of the third green quantum dot layer QD-G3 can be slightly smaller than that of the third red quantum dot layer QD-R3, thereby improving the conversion efficiency of red light.

[0057] In some exemplary embodiments, such as Figures 2A to 2CAs shown, the second substrate 2 may include a second substrate 20 and a second quantum dot layer and a color resist layer 21 disposed on the side of the second substrate 20 near the first substrate 1. The second quantum dot layer includes a second red quantum dot layer QD-R2, a second green quantum dot layer QD-G2 and a second light-transmitting layer 221. In this configuration, the orthographic projection of the second red quantum dot layer QD-R2 onto the first substrate 10 overlaps with the orthographic projection of the first red quantum dot layer QD-R1 onto the first substrate 10. The second red quantum dot layer QD-R2 is configured to convert blue light emitted by the light-emitting device of the corresponding sub-pixel that has not been converted by the first red quantum dot layer QD-R1 into red light. Similarly, the orthographic projection of the second green quantum dot layer QD-G2 onto the first substrate 10 overlaps with the orthographic projection of the first green quantum dot layer QD-G1 onto the first substrate 10. The second green quantum dot layer QD-G2 is configured to convert blue light emitted by the light-emitting device of the corresponding sub-pixel that has not been converted by the first green quantum dot layer QD-G1 into green light. Furthermore, the orthographic projection of the second light-transmitting layer 221 onto the first substrate 10 overlaps with the orthographic projection of the first light-transmitting layer 151 onto the first substrate 10. The second light-transmitting layer 221 is configured to transmit blue light emitted by the light-emitting device of the corresponding blue sub-pixel.

[0058] In other exemplary embodiments, such as Figures 2A to 2C As shown, the second substrate 2 may include a second substrate 20 and a second quantum dot layer and a color resist layer 21 disposed on the side of the second substrate 20 near the first substrate 1. The second quantum dot layer includes a second red quantum dot layer QD-R2, a second green quantum dot layer QD-G2, and a blue filter unit layer 222. The orthographic projection of the second red quantum dot layer QD-R2 onto the first substrate 10 overlaps with the orthographic projection of the first red quantum dot layer QD-R1 onto the first substrate 10. The second red quantum dot layer QD-R2 is configured to convert the blue-green light emitted by the light-emitting device of the corresponding sub-pixel that has not been converted by the first red quantum dot layer QD-R1 into red light. The orthographic projection of the second green quantum dot layer QD-G2 onto the first substrate 10 overlaps with the orthographic projection of the first green quantum dot layer QD-G1 onto the first substrate 10. In the region, the second green quantum dot layer QD-G2 is configured to convert the blue-green light emitted by the light-emitting device of the corresponding sub-pixel that has not been converted by the first green quantum dot layer QD-G1 into green light; the blue filter unit layer 222 has an overlapping region with the orthographic projection of the first light-transmitting layer 151 on the first substrate 10, and is configured to transmit the blue light component in the blue-green light emitted by the light-emitting device of the corresponding blue sub-pixel and filter out the green light component in the blue-green light emitted by the light-emitting device of the corresponding blue sub-pixel.

[0059] The red quantum dots in the second red quantum dot layer QD-R2 convert blue or blue-green light that has not been converted by the first red quantum dot layer QD-R1 into red light, and reuse the unfiltered blue or blue-green light, thereby improving light conversion efficiency and increasing the color gamut of the product; the green quantum dots in the second green quantum dot layer QD-G2 convert blue or blue-green light that has not been converted by the first green quantum dot layer QD-G1 into green light, and reuse the unfiltered blue or blue-green light, thereby improving light conversion efficiency and increasing the color gamut of the product; the second light-transmitting layer 221 and the first light-transmitting layer 151 can transmit blue light (or, the blue filter unit layer can transmit the blue light component in the blue-green light and filter out the green light component in the blue-green light), so that the blue sub-pixels display blue.

[0060] The display panel of this embodiment improves the utilization rate of blue or blue-green light in the backlight by setting a first quantum dot layer on a first substrate and a second quantum dot layer on a second substrate, thereby increasing the red efficiency of the QD product, enhancing the display quality and product lifespan. Furthermore, since the two quantum dot layers are respectively set on two substrates, the second substrate can serve as a cover plate, saving one substrate layer. The display panel of this embodiment can be manufactured using existing equipment and methods, is easy to implement, has good process compatibility, low production cost, and high product quality, demonstrating promising application prospects.

[0061] In some exemplary embodiments, the orthographic projections of the first red quantum dot layer QD-R1 and the second red quantum dot layer QD-R2 on the second substrate 20 overlap; the orthographic projections of the first green quantum dot layer QD-G1 and the second green quantum dot layer QD-G2 on the second substrate 20 overlap.

[0062] In some exemplary embodiments, the orthographic projection of the first red quantum dot layer QD-R1 on the second substrate 20 covers the orthographic projection of the second red quantum dot layer QD-R2 on the second substrate 20; the orthographic projection of the first green quantum dot layer QD-G1 on the second substrate 20 covers the orthographic projection of the second green quantum dot layer QD-G2 on the second substrate 20.

[0063] In some exemplary embodiments, the width W1 of the surface of the first red quantum dot layer QD-R1 away from the first substrate 10 in the first direction X is greater than the width W2 of the surface of the second red quantum dot layer QD-R2 close to the first substrate 10 in the first direction X. This can sufficiently improve the light output of the first red quantum dot layer QD-R1 and improve the light conversion efficiency of the second red quantum dot layer QD-R2.

[0064] In some exemplary embodiments, the width W3 of the surface of the first green quantum dot layer QD-G1 on the side away from the first substrate 10 in the first direction X is greater than the width W4 of the surface of the second green quantum dot layer QD-G2 on the side close to the first substrate 10 in the first direction X. This can sufficiently improve the light output of the first green quantum dot layer QD-G1 and improve the light conversion efficiency of the second green quantum dot layer QD-G2.

[0065] In some exemplary embodiments, the width W5 of the surface of the first light-transmitting layer 151 on the side away from the first substrate 10 in the first direction X is greater than the width W6 of the surface of the second light-transmitting layer 221 on the side close to the first substrate 10 in the first direction X, so as to sufficiently improve the light emission of the first light-transmitting layer 151.

[0066] In some exemplary embodiments, such as Figure 5 As shown, the color resist layer 21 can be in the form of a grid and have multiple color resist layer openings. The second red quantum dot layer QD-R2, the second green quantum dot layer QD-G2, and the second light-transmitting layer 221 can be located in a corresponding color resist layer opening.

[0067] In some exemplary embodiments, such as Figure 5 As shown, the color resist layer 21 includes a plurality of first color resist portions 211 extending along the first direction X. The plurality of first color resist portions 211 are arranged sequentially in the second direction Y. The color resist layer 21 also includes a plurality of sets of second color resist portions 212. Each set of second color resist portions 212 includes a plurality of second color resist portions 212 located between two adjacent first color resist portions 211 and spaced apart along the first direction X. Each second color resist portion 212 extends along the second direction Y.

[0068] In some exemplary embodiments, the material of the first color resist portion 211 and the material of the second color resist portion 212 may be the same or different.

[0069] In some exemplary embodiments, the material of the first color resist portion 211 includes at least one of the following: metallic chromium, chromium oxide, or black resin.

[0070] In some exemplary embodiments, the second color resist portion 212 is formed by the overlapping portion of two adjacent filter units that transmit different colors of light in the first direction X; or, the material of the second color resist portion 212 includes at least one of the following: metallic chromium, chromium oxide, or black resin.

[0071] In some exemplary embodiments, the projection of the first color resist portion 211 on the first substrate 10 overlaps with the projections of the adjacent first red quantum dot layer QD-R1 and first green quantum dot layer QD-G1 on the first substrate 10. This minimizes the possibility of light emitted from the first red quantum dot layer QD-R1 entering the second green quantum dot layer QD-G2, and light emitted from the first green quantum dot layer QD-G1 entering the second red quantum dot layer QD-R2. Similarly, the projection of the first color resist portion 211 on the first substrate 10 overlaps with the projections of the adjacent first light-transmitting layer 151 and first green quantum dot layer QD-G1 on the first substrate 10; the projection of the first color resist portion 211 on the first substrate 10 overlaps with the projections of the adjacent first light-transmitting layer 151 and first red quantum dot layer QD-R1 on the first substrate 10. In some exemplary embodiments, the projection of the first color resist portion 211 on the first substrate 10 overlaps with the projection of the separating layer 14 on the first substrate 10. Optionally, the projection of the first color resist portion 211 on the first substrate 10 covers the projection of the separator layer 14 on the first substrate 10.

[0072] In some exemplary embodiments, the thickness of the first red quantum dot layer QD-R1 in the direction perpendicular to the display panel is greater than the thickness of the second red quantum dot layer QD-R2 in the direction perpendicular to the display panel; the thickness of the first green quantum dot layer QD-G1 in the direction perpendicular to the display panel is greater than the thickness of the second green quantum dot layer QD-G2 in the direction perpendicular to the display panel.

[0073] In some exemplary embodiments, the thickness of the first red quantum dot layer QD-R1 is 1µm to 3µm greater than the thickness of the second red quantum dot layer QD-R2. If the thickness difference between the first red quantum dot layer QD-R1 and the second red quantum dot layer QD-R2 is too small, the overall device thickness will be too large; if the thickness difference between the first red quantum dot layer QD-R1 and the second red quantum dot layer QD-R2 is too large, the light conversion efficiency of the second red quantum dot layer QD-R2 will be reduced. The display panel of this disclosure, by setting an appropriate thickness difference, achieves a suitable overall device thickness and high light conversion efficiency of the second red quantum dot layer QD-R2.

[0074] In some exemplary embodiments, the thickness of the first green quantum dot layer QD-G1 is 1µm to 3µm greater than the thickness of the second green quantum dot layer QD-G2. If the thickness difference between the first green quantum dot layer QD-G1 and the second green quantum dot layer QD-G2 is too small, the overall device thickness will be too large; if the thickness difference between the first green quantum dot layer QD-G1 and the second green quantum dot layer QD-G2 is too large, the light conversion efficiency of the second green quantum dot layer QD-G2 will be reduced. The display panel of this disclosure, by setting an appropriate thickness difference, achieves a suitable overall device thickness and high light conversion efficiency of the second green quantum dot layer QD-G2.

[0075] In some exemplary embodiments, the first red quantum dot layer QD-R1 has a thickness of 5 μm to 15 μm in the direction perpendicular to the display panel, and the first green quantum dot layer QD-G1 has a thickness of 5 μm to 15 μm in the direction perpendicular to the display panel.

[0076] In some exemplary embodiments, the second red quantum dot layer QD-R2 has a thickness of 2µm to 5µm in the direction perpendicular to the display panel, and the second green quantum dot layer QD-G2 has a thickness of 2µm to 5µm in the direction perpendicular to the display panel.

[0077] In some exemplary embodiments, such as Figure 2B As shown, the second substrate may further include a color filter layer, which includes a red filter unit CF-R and a green filter unit CF-G. The red filter unit CF-R and the second red quantum dot layer QD-R2 are located within the color resist layer opening of the corresponding red sub-pixel, and the green filter unit CF-G and the second green quantum dot layer QD-G2 are located within the color resist layer opening of the corresponding green sub-pixel. The red filter unit CF-R is located on the side of the second red quantum dot layer QD-R2 closest to the second substrate 20, and the green filter unit CF-G is located on the side of the second green quantum dot layer QD-G2 closest to the second substrate 20. In some exemplary embodiments, such as Figure 2C As shown, the second substrate may further include a color filter layer, which includes a red filter unit CF-R that can transmit red light and a green filter unit CF-G that can transmit green light. The red filter unit CF-R and the second red quantum dot layer QD-R2 are located in the color resist layer opening of the corresponding red sub-pixel, and the green filter unit CF-G and the second green quantum dot layer QD-G2 are located in the color resist layer opening of the corresponding green sub-pixel. The red filter unit CF-R is located on the side of the second red quantum dot layer QD-R2 away from the second substrate 20, and the green filter unit CF-G is located on the side of the second green quantum dot layer QD-G2 away from the second substrate 20.

[0078] In some other exemplary embodiments, at least some pixel units may include red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels (not shown in the figures).

[0079] In some exemplary implementations, such as Figure 4A As shown, the second quantum dot layer may further include a second yellow quantum dot layer QD-Y2. The orthographic projection of the second yellow quantum dot layer QD-Y2 onto the second substrate 20 overlaps with the orthographic projection of the first yellow quantum dot layer QD-Y1 onto the second substrate 20. The quantum dots of the second yellow quantum dot layer QD-Y2 can convert a portion of the blue or blue-green light emitted by the light-emitting device of the corresponding white sub-pixel that has not been converted by the first yellow quantum dot layer QD-Y1 into yellow light. It can also transmit another portion of blue or blue-green light, so that the converted yellow light and the transmitted blue or blue-green light mix to form white light, making the white sub-pixel display white. This achieves RGBW four-color display, greatly improving color richness and display brightness, and enabling the production of panels with higher resolution. Furthermore, the display panel does not require a blue light filter on the white sub-pixel, improving the utilization rate of blue backlight and simplifying the manufacturing process.

[0080] In other exemplary embodiments, such as Figure 4B As shown, the second quantum dot layer may further include a second yellow quantum dot layer. The orthographic projection of the second yellow quantum dot layer on the second substrate 20 overlaps with the orthographic projection of the first yellow quantum dot layer on the second substrate 20. The second yellow quantum dot layer may include a fourth red quantum dot layer QD-R4 and a fourth green quantum dot layer QD-G4 stacked sequentially along the direction away from the second substrate 20. That is, the fourth green quantum dot layer QD-G4 is disposed on the side of the second substrate 20 closer to the first substrate 1, and the fourth red quantum dot layer QD-R4 is disposed on the side of the fourth green quantum dot layer QD-G4 away from the second substrate 20. Blue light or blue-green light emitted by a blue OLED device that has not been converted by the first yellow quantum dot layer first illuminates the fourth red quantum dot layer (QD-R4) from bottom to top. Since the conversion rate will not reach 100%, the fourth red quantum dot layer (QD-R4) can convert some of the blue light or blue-green light into red light, while allowing another portion of the blue light or blue-green light to pass through. The fourth green quantum dot layer (QD-G4) can convert some of the blue light or blue-green light that has passed through the fourth red quantum dot layer (QD-R4) into green light, and also allows another portion of the blue light or blue-green light that has not been converted by the fourth red quantum dot layer (QD-R4) to pass through. At the same time, since the energy of the emitted red light is lower than the excitation energy of the green quantum dots, the fourth green quantum dot layer does not convert it into green light, but allows the red light to pass through. Finally, the red light and green light converted by the two quantum dot layers are mixed to form yellow light, and the yellow light is mixed with the blue light that has not been converted by the two quantum dot layers to form white light, which is then emitted.

[0081] In some exemplary embodiments, such as Figure 4B As shown, the sum of the thicknesses of the fourth red quantum dot layer QD-R4 and the fourth green quantum dot layer QD-G4 is equal to at least one of the thicknesses of the second red quantum dot layer QD-R2, the second green quantum dot layer QD-G2, and the second light-transmitting layer 221; this better ensures that the contact surfaces between each layer on the second substrate 2 and the organic adhesive layer 3 remain flat.

[0082] In some exemplary embodiments, such as Figure 4B As shown, the thicknesses of the fourth green quantum dot layer QD-G4 and the fourth red quantum dot layer QD-R4 can be equal or unequal. For example, the thickness of the fourth green quantum dot layer QD-G4 can be slightly smaller than that of the fourth red quantum dot layer QD-R4, thereby improving the conversion efficiency of red light.

[0083] In some exemplary embodiments, such as Figure 4B As shown, the thickness of the first red quantum dot layer QD-R1 is greater than the thickness of the third red quantum dot layer QD-R3, and the thickness of the second red quantum dot layer QD-R1 is greater than the thickness of the fourth red quantum dot layer QD-R4. This design can better coordinate the thickness of multiple quantum dots, improve the conversion rate of blue or blue-green light, and make yellow light and blue light that has not been converted by the two quantum dot layers mix into white light and emit it.

[0084] The technical solution of this embodiment is further illustrated below through the fabrication process of the display panel in this embodiment. The "patterning process" mentioned in this embodiment includes processes such as film deposition, photoresist coating, mask exposure, development, etching, and photoresist stripping, which are mature fabrication processes in related technologies. Deposition can employ known processes such as sputtering, evaporation, and chemical vapor deposition; coating can employ known coating processes; and etching can employ known methods, without specific limitations. In the description of this embodiment, it should be understood that a "thin film" refers to a thin film made by depositing or coating a certain material on a substrate. If the "thin film" does not require a patterning process or photolithography process during the entire fabrication process, it can also be called a "layer." If the "thin film" requires a patterning process or photolithography process during the entire fabrication process, it is called a "thin film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process or photolithography process contains at least one "pattern."

[0085] First, a first substrate 1 and a second substrate 2 are prepared respectively. The first substrate 1 includes a first substrate 10 and a driving structure layer 11, a light-emitting structure layer 12 and an encapsulation structure layer 13 sequentially disposed on the first substrate 10, as well as a first quantum dot layer and a separating layer 14 disposed on the side of the encapsulation structure layer 13 away from the first substrate 10. The second substrate 2 includes a second substrate 20 and a color resist layer 21 and a second quantum dot layer (which may also include a color filter layer) sequentially disposed on the second substrate 20. Then, an alignment organic adhesive is coated on one of the substrates, the first substrate 1 and the second substrate 2 are aligned, and they are pressed and sealed under vacuum conditions to form a display panel.

[0086] The preparation of the first substrate 1 includes:

[0087] (I) A pattern of an array structure layer 11 is formed on the first substrate 10. Forming the array structure layer 11 includes:

[0088] (a) Forming an active semiconductor layer pattern. Forming an active semiconductor layer pattern includes: sequentially depositing a first insulating film and an active layer film on a first substrate 10, patterning the active layer film using a patterning process to form a first insulating layer, and an active semiconductor layer pattern disposed on the first insulating layer, wherein the position of the active semiconductor layer corresponds to the position of the gate electrode subsequently formed.

[0089] (b) Forming a gate electrode layer pattern. Forming a gate electrode layer pattern includes: sequentially depositing a second insulating film and a first metal film on a first substrate 10 on which the aforementioned pattern is formed; patterning the first metal film using a patterning process to form a second insulating layer covering the active semiconductor layer pattern; and a gate electrode layer pattern disposed on the second insulating layer. The gate electrode layer may include at least one gate line and at least one gate electrode pattern, and the gate line and the gate electrode may be an integral structure.

[0090] (c) Forming source / drain electrode layer patterns. Forming source / drain electrode layer patterns includes: depositing a third insulating film and a second metal film on a first substrate 10 on which the aforementioned patterns are formed; patterning the third insulating film and the second metal film respectively using a patterning process to form a third insulating layer and source / drain electrode layer patterns disposed on the gate electrode layer; the source / drain electrode layer may include patterns of data lines (not shown in the figure), source electrodes, and drain electrodes; the source electrodes and data lines may be an integral structure interconnected; one end of the source electrode adjacent to the drain electrode is connected to one end of the active semiconductor layer through a via on the third insulating layer; one end of the drain electrode adjacent to the source electrode is connected to the other end of the active semiconductor layer through a via on the third insulating layer; and a conductive channel is formed between the source electrode and the drain electrode.

[0091] (II) A pattern of a fourth insulating layer is formed on a first substrate 10 having the aforementioned pattern.

[0092] Forming the fourth insulating layer includes: depositing a fourth insulating film on a first substrate 10 having the aforementioned pattern to form a fourth insulating layer covering the source and drain electrode layer pattern; patterning the fourth insulating layer using a patterning process to form a first via K1 pattern; and etching away the fourth insulating layer within the first via K1 to expose the surface of the drain electrode.

[0093] (III) A light-emitting structure layer 12 pattern is formed on the first substrate 10 having the aforementioned pattern. Forming the light-emitting structure layer 12 includes:

[0094] (a) A transparent conductive film is deposited on a first substrate 10 having the aforementioned pattern, and the transparent conductive film is patterned by a patterning process to form an anode pattern, wherein the transparent conductive film may be indium tin oxide (ITO) or indium zinc oxide (IZO).

[0095] (b) A pixel definition film is coated on the substrate on which the aforementioned pattern is formed, and a pixel definition layer pattern is formed by photolithography. The pixel definition layer pattern defines a pixel opening area for exposing the anode in each sub-pixel. The pixel definition layer may be made of polyimide, acrylic or polyethylene terephthalate, etc.

[0096] (c) An organic light-emitting layer is formed using a vapor deposition process. The organic light-emitting layer is at least partially disposed within the pixel opening and is connected to the anode. In an exemplary embodiment, the organic light-emitting layer may include at least a hole injection layer, a hole transport layer, a light-emitting layer, and a hole blocking layer stacked on the anode. In an exemplary embodiment, the hole injection layers of all sub-pixels are common layers connected together, the hole transport layers of all sub-pixels are common layers connected together, the light-emitting layers of adjacent sub-pixels may have a small overlap or may be isolated, and the hole blocking layers are common layers connected together.

[0097] (d) A cathode is formed on the organic light-emitting layer, and the cathode is connected to the organic light-emitting layer.

[0098] In this embodiment of the present disclosure, the organic light-emitting layer emits blue light under the drive of an anode and a cathode.

[0099] (IV) A packaging structure layer 13 pattern is formed on the first substrate 10 on which the aforementioned pattern is formed. The packaging layer may include a first packaging layer, a second packaging layer and a third packaging layer stacked together. The first packaging layer and the third packaging layer may be made of inorganic materials, and the second packaging layer may be made of organic materials. The second packaging layer is disposed between the first packaging layer and the third packaging layer to ensure that external moisture cannot enter the light-emitting device.

[0100] (V) A separation layer 14 and a first quantum dot layer pattern are formed on a first substrate 10 having the aforementioned pattern. Forming the separation layer 14 and the first quantum dot layer includes:

[0101] A separation layer 14 is formed on the side of the encapsulation structure layer 13 away from the first substrate 10. The separation layer 14 has a plurality of separation portions extending along the second direction Y, and the plurality of separation portions are arranged sequentially along the first direction X.

[0102] A first green quantum dot layer QD-G1, a first red quantum dot layer QD-R1, and a first light-transmitting layer 151 are printed in the spacer region between two adjacent partitions.

[0103] The preparation of the second substrate 2 includes:

[0104] (I) A pattern of color resist layer 21 is formed on the second substrate 20. Forming the color resist layer 21 includes: coating a polymer photoresist layer mixed with a black matrix material on the second substrate 20, and then exposing and developing it to form the pattern of the color resist layer 21. The color resist layer 21 may be in a grid shape and have multiple color resist layer openings.

[0105] (II) A pattern of a second quantum dot layer is formed on the second substrate 20 on which the aforementioned pattern is formed. Forming the second quantum dot layer includes: printing a second red quantum dot layer QD-R2, a second green quantum dot layer QD-G2, and a second light-transmitting layer 221 within the opening of the color resist layer.

[0106] As can be seen from the above description of this embodiment, the display panel of this disclosure improves the utilization rate of blue or blue-green light in the backlight by setting a first quantum dot layer on a first substrate and a second quantum dot layer on a second substrate, thereby improving the red efficiency of the QD product, enhancing the display quality and lifespan of the product. Furthermore, since the two quantum dot layers are respectively set on two substrates, the second substrate can serve as a cover plate, thus saving one substrate layer. The display panel of this embodiment can be manufactured using existing process equipment and methods, is easy to implement, has good process compatibility, low production cost, high product quality, and good application prospects.

[0107] In this embodiment, the structures of the first substrate 1 and the second substrate 2 are merely examples. In actual implementation, the structures of the first substrate 1 and the second substrate 2 can be adjusted according to actual needs. For example, when preparing the second substrate 2, a color filter layer can be prepared. The color filter layer can be disposed between the second substrate 20 and the second quantum dot layer, or it can be disposed on the side of the second quantum dot layer away from the second substrate 20. Pixel units can include red sub-pixels, green sub-pixels, and blue sub-pixels, or they can include red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels, etc. Those skilled in the art can understand and make corresponding extensions based on common knowledge and existing technology, and no specific limitations are made here.

[0108] This disclosure also provides a method for manufacturing a display panel, the method comprising:

[0109] S1. A first substrate and a second substrate are formed respectively. The first substrate includes a first substrate and a driving structure layer, a light-emitting structure layer, an encapsulation structure layer and a first quantum dot layer are stacked sequentially on the side of the first substrate near the second substrate. The first quantum dot layer includes a first red quantum dot layer and a first green quantum dot layer. The second substrate includes a second substrate and a second quantum dot layer disposed on the side of the second substrate near the first substrate. The second quantum dot layer includes a second red quantum dot layer and a second green quantum dot layer.

[0110] S2. The first substrate and the second substrate are aligned, and there is an overlapping area between the orthographic projection of the first red quantum dot layer on the first substrate and the orthographic projection of the second red quantum dot layer on the first substrate; there is an overlapping area between the orthographic projection of the first green quantum dot layer on the first substrate and the orthographic projection of the second green quantum dot layer on the first substrate.

[0111] The specific manufacturing process of the display panel has been described in detail in the previous embodiments and will not be repeated here.

[0112] This disclosure also provides a display device, including the aforementioned display panel. The display device can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator, or it can be a wearable electronic device such as a smartwatch or smart bracelet.

[0113] While the embodiments disclosed herein are as described above, the content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A display panel, characterized in that, include: The first substrate and the second substrate are disposed opposite to each other, wherein: The first substrate includes a first substrate and a driving structure layer, a light-emitting structure layer, an encapsulation structure layer, and a first quantum dot layer sequentially stacked on the side of the first substrate near the second substrate. The first quantum dot layer includes a first red quantum dot layer and a first green quantum dot layer. The first substrate also includes a separator layer and a first light-transmitting layer. The separator layer includes a plurality of separators extending along a second direction. The plurality of separators are arranged sequentially along a first direction. The first red quantum dot layer, the first green quantum dot layer, and the first light-transmitting layer are respectively located in the interval region between two adjacent separators and are continuously arranged in the second direction. The first direction and the second direction intersect. The material of the separator layer is a transparent insulating material. Subpixels in the same column in the second direction are subpixels of the same color. The separators are used to prevent the quantum dot layer ink of the same column of subpixels from climbing to the subpixels of adjacent columns. The second substrate includes a second substrate and a second quantum dot layer disposed on the side of the second substrate close to the first substrate. The second quantum dot layer includes a second red quantum dot layer and a second green quantum dot layer. The second substrate also includes a color resist layer and a second light-transmitting layer. The color resist layer is in the form of a grid and has a plurality of color resist layer openings. The second red quantum dot layer, the second green quantum dot layer and the second light-transmitting layer are each located in one color resist layer opening. The material of the color resist layer includes at least one of the following: metallic chromium, chromium oxide or black resin. The orthographic projection of the first red quantum dot layer on the first substrate covers the orthographic projection of the second red quantum dot layer on the first substrate; the orthographic projection of the first green quantum dot layer on the first substrate covers the orthographic projection of the second green quantum dot layer on the first substrate. The width of the surface of the first red quantum dot layer on the side away from the first substrate in the first direction is greater than the width of the surface of the second red quantum dot layer on the side close to the first substrate in the first direction; the width of the surface of the first green quantum dot layer on the side away from the first substrate in the first direction is greater than the width of the surface of the second green quantum dot layer on the side close to the first substrate in the first direction, where the first direction is the arrangement direction of multiple sub-pixels in the pixel unit. The thickness of the first red quantum dot layer in the direction perpendicular to the display panel is 1µm to 3µm greater than the thickness of the second red quantum dot layer in the direction perpendicular to the display panel; the thickness of the first green quantum dot layer in the direction perpendicular to the display panel is 1µm to 3µm greater than the thickness of the second green quantum dot layer in the direction perpendicular to the display panel.

2. The display panel according to claim 1, characterized in that, The thickness of the first red quantum dot layer in the direction perpendicular to the display panel is between 5 μm and 15 μm, and the thickness of the first green quantum dot layer in the direction perpendicular to the display panel is between 5 μm and 15 μm. The second red quantum dot layer has a thickness of 2µm to 5µm in the direction perpendicular to the display panel, and the second green quantum dot layer has a thickness of 2µm to 5µm in the direction perpendicular to the display panel.

3. The display panel according to claim 1, characterized in that, The color resist layer includes a plurality of first color resist portions extending along a first direction, and the plurality of first color resist portions are arranged sequentially in a second direction. The color resist layer further includes multiple sets of second color resist portions. Each set of second color resist portions includes multiple second color resist portions located between two adjacent first color resist portions and spaced apart along the first direction. Each second color resist portion extends along the second direction.

4. The display panel according to claim 3, characterized in that, The projection of the first color resist on the first substrate overlaps with the projections of the adjacent first red quantum dot layer and first green quantum dot layer on the first substrate. The projection of the first color resist layer on the first substrate overlaps with the projections of the adjacent first green quantum dot layer and the first light-transmitting layer on the first substrate. The projection of the first color resist layer on the first substrate overlaps with the projections of the adjacent first red quantum dot layer and the first light-transmitting layer on the first substrate.

5. The display panel according to claim 3, characterized in that, The projection of the first color resist on the first substrate overlaps with the projection of the separator layer on the first substrate.

6. The display panel according to claim 1, characterized in that, The display panel includes multiple pixel units arranged in an array, each pixel unit including a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the second substrate also includes a color filter layer. The color filter layer includes a red filter unit and a green filter unit. The red filter unit and the second red quantum dot layer are located within the color resist layer opening of the corresponding red sub-pixel. The green filter unit and the second green quantum dot layer are located within the color resist layer opening of the corresponding green sub-pixel. The red filter unit is located on the side of the second red quantum dot layer closer to the second substrate, and the green filter unit is located on the side of the second green quantum dot layer closer to the second substrate.

7. The display panel according to claim 1, characterized in that, The display panel includes multiple pixel units arranged in an array, each pixel unit including a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the second substrate also includes a color filter layer. The color filter layer includes a red filter unit and a green filter unit. The red filter unit and the second red quantum dot layer are located within the color resist layer opening of the corresponding red sub-pixel. The green filter unit and the second green quantum dot layer are located within the color resist layer opening of the corresponding green sub-pixel. The red filter unit is located on the side of the second red quantum dot layer away from the second substrate, and the green filter unit is located on the side of the second green quantum dot layer away from the second substrate.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 7.

9. A method for manufacturing a display panel, characterized in that, include: A first substrate and a second substrate are formed respectively. The first substrate includes a first substrate and a driving structure layer, a light-emitting structure layer, an encapsulation structure layer, and a first quantum dot layer sequentially stacked on the side of the first substrate near the second substrate. The first quantum dot layer includes a first red quantum dot layer and a first green quantum dot layer. The first substrate also includes a separator layer and a first light-transmitting layer. The separator layer includes multiple separators extending along a second direction. The multiple separators are arranged sequentially along a first direction. The first red quantum dot layer, the first green quantum dot layer, and the first light-transmitting layer are located in the interval region between two adjacent separators and are continuously arranged in the second direction. The first direction and the second direction intersect. The material of the separator layer is a transparent insulating material. The second substrate includes a second substrate and a second quantum dot layer disposed on the side of the second substrate near the first substrate. The second quantum dot layer includes a second red quantum dot layer and a second green quantum dot layer. The substrate further includes a color resist layer and a second light-transmitting layer. The color resist layer is in a mesh shape and has multiple color resist layer openings. The second red quantum dot layer, the second green quantum dot layer, and the second light-transmitting layer are each located within a color resist layer opening. The material of the color resist layer includes at least one of the following: metallic chromium, chromium oxide, or black resin. The width of the surface of the first red quantum dot layer away from the first substrate in a first direction is greater than the width of the surface of the second red quantum dot layer near the first substrate in the first direction. The width of the surface of the first green quantum dot layer away from the first substrate in the first direction is greater than the width of the surface of the second green quantum dot layer near the first substrate in the first direction. The first direction is the arrangement direction of multiple sub-pixels in the pixel unit. The thickness of the first red quantum dot layer in the direction perpendicular to the display panel is 1µm to 3µm greater than the thickness of the second red quantum dot layer in the direction perpendicular to the display panel. The thickness of the first green quantum dot layer in the direction perpendicular to the display panel is 1µm to 3µm greater than the thickness of the second green quantum dot layer in the direction perpendicular to the display panel. In the second direction, the sub-pixels in the same column are sub-pixels of the same color, and the separator is used to prevent the quantum dot layer ink of the same column of sub-pixels from climbing to the sub-pixels of adjacent columns; The first substrate and the second substrate are aligned, and the orthographic projection of the first red quantum dot layer on the first substrate covers the orthographic projection of the second red quantum dot layer on the first substrate. The orthographic projection of the first green quantum dot layer on the first substrate covers the orthographic projection of the second green quantum dot layer on the first substrate.

Images