Touch display panel, preparation method thereof and display device

Abstract

The disclosure provides a touch display panel, a manufacturing method thereof, and a display device. The touch display panel comprises: a first substrate including a sub-pixel region; a plurality of light emitting devices corresponding to the sub-pixel region one by one; a first pixel definition layer including a first opening region corresponding to the sub-pixel region one by one; a plurality of quantum dot layers located in at least part of the first opening region; a touch module including a first touch electrode layer; at least one stacked insulating structure for transmitting light emitted through each quantum dot layer and reflecting light emitted by the light emitting device; the stacked insulating structure includes a first refractive index layer and a second refractive index layer; the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer; the second refractive index layer is located between the first refractive index layer and the quantum dot layer; the first refractive index layer includes a plurality of first refractive index patterns, the first refractive index patterns correspond to the quantum dot layers one by one; the first refractive index pattern is at least covered by the orthographic projection of the quantum dot layer on the first substrate.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a touch display panel, its manufacturing method, and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) possess characteristics such as self-emission, wide viewing angle, wide color gamut, high contrast, thinness, foldability, flexibility, and portability, making them a major research direction in the display field. However, their relatively wide emission spectrum and peak color gamut coverage limit their development. Quantum dot light-emitting diodes (QLEDs), as an emerging technology, benefit from the quantum confinement effect of their quantum dot materials, which transforms continuous energy bands into discrete energy levels, enabling the emission of high-purity light with narrow peak widths. They have attracted considerable attention and research in recent years. Currently, the more mature quantum dot (QD)-OLED devices use non-pixelated blue OLED devices as backlights, exciting red and green QDs with blue light to emit red and green light respectively. However, the limited absorption of blue backlight by the QD material limits the luminous efficiency of the quantum dots, thus affecting the front light emission efficiency and color gamut of the display. Summary of the Invention

[0003] This disclosure provides a touch display panel, which includes:

[0004] The first substrate includes multiple sub-pixel regions;

[0005] Multiple light-emitting devices are located on one side of the first substrate, corresponding one-to-one with the sub-pixel areas;

[0006] The first pixel definition layer is located on the side of the light-emitting device away from the first substrate, and includes a first opening area corresponding to each sub-pixel area;

[0007] Multiple quantum dot layers are located on the side of the light-emitting device away from the first substrate and are located within at least a portion of the first opening region;

[0008] The touch module is located on the side of the quantum dot layer away from the light-emitting device, and includes a first touch electrode layer;

[0009] At least one stacked insulating structure is located between the quantum dot layer and the first touch electrode layer, for transmitting light emitted from each quantum dot layer and reflecting light emitted from the light-emitting device; the stacked insulating structure includes: a first refractive index layer and a second refractive index layer disposed entirely within the layer; the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer; the second refractive index layer is located between the first refractive index layer and the quantum dot layer; the first refractive index layer includes a plurality of first refractive index patterns, each of which corresponds one-to-one with a quantum dot layer; the orthographic projection of the first refractive index pattern onto the first substrate at least covers the orthographic projection of the quantum dot layer onto the first substrate.

[0010] In some embodiments, the touch module further includes: a first buffer layer located between the quantum dot layer and the first touch electrode layer, a second touch electrode layer located between the first touch electrode layer and the first buffer layer, and a first insulating layer located between the first touch electrode layer and the second touch electrode layer.

[0011] The second refractive index layer is located between the first buffer layer and the second touch electrode layer;

[0012] The first insulating layer includes a second opening region corresponding to the quantum dot layer, and the first refractive index pattern is located within the second opening region.

[0013] In some embodiments, the thickness of the first refractive index pattern is equal to the thickness of the first insulating layer in a direction perpendicular to the first substrate.

[0014] In some embodiments, the material of the first refractive index pattern includes silicon oxide.

[0015] In some embodiments, the refractive index of the first refractive index pattern is greater than or equal to 1.45 and less than or equal to 1.55.

[0016] In some embodiments, the material of the first refractive index pattern includes one or a combination of the following: acrylic resin, polyurethane resin, silicone resin, and epoxy resin.

[0017] In some embodiments, the refractive index of the first refractive index pattern is greater than or equal to 1.30 and less than or equal to 1.50.

[0018] In some embodiments, the material of the second refractive index layer includes silicon oxynitride.

[0019] In some embodiments, the refractive index of the second refractive index layer is greater than or equal to 1.65 and less than or equal to 1.75.

[0020] In some embodiments, the stacked insulation structure further includes:

[0021] The third refractive index layer is located between the first and second refractive index layers; the refractive index of the third refractive index layer is less than that of the second refractive index layer, and the refractive index of the third refractive index layer is different from that of the first refractive index layer.

[0022] In some embodiments, the third refractive index layer comprises an organic matrix.

[0023] In some embodiments, the organic matrix material includes one or a combination of the following: silane resin, epoxy resin.

[0024] In some embodiments, the refractive index of the third refractive index pattern is greater than or equal to 1.45 and less than or equal to 1.60.

[0025] In some embodiments, the refractive index of the third refractive index layer is less than that of the first refractive index layer.

[0026] In some embodiments, the refractive index of the third refractive index layer is greater than or equal to 1.25 and less than or equal to 1.45.

[0027] In some embodiments, the third refractive index layer further includes hollow particles dispersed in an organic matrix.

[0028] In some embodiments, the quantum dot layer is located within a portion of the first opening region;

[0029] The touch display panel also includes: multiple first fill layers located within a first opening area outside the quantum dot layer;

[0030] The orthographic projection of the first refractive index layer onto the first substrate does not overlap with the orthographic projection of the first filler layer onto the first substrate.

[0031] In some embodiments, the touch display panel further includes: a first light-transmitting structure located between the first filling layer and the touch electrode layer, for transmitting light emitted by the light-emitting device;

[0032] The first light-transmitting structure includes: a fourth refractive index layer and a fifth refractive index layer located between the fourth refractive index layer and the first filling layer; the refractive index of the fourth refractive index layer is different from that of the fifth refractive index layer; the fifth refractive index layer includes a second refractive index pattern corresponding to the first filling layer, the orthographic projection of the second refractive index pattern on the first substrate at least covers the orthographic projection of the first filling layer on the first substrate, and the orthographic projection of the second refractive index pattern on the first substrate and the orthographic projection of the quantum dot layer on the first substrate do not overlap.

[0033] In some embodiments, the touch module includes a first buffer layer, which is reused as a fourth refractive index layer.

[0034] In some embodiments, the orthographic projection of the second refractive index layer onto the orthographic projection of the first filler layer onto the first substrate.

[0035] In some embodiments, the touch display panel further includes a third refractive index layer, the orthographic projection of the third refractive index layer onto the orthographic projection of the first filling layer onto the first substrate.

[0036] In some embodiments, the plurality of light-emitting devices are blue light-emitting devices; the plurality of sub-pixel regions include: a plurality of red sub-pixel regions, a plurality of blue sub-pixel regions, and a plurality of green sub-pixel regions;

[0037] The quantum dot layer is located only within the first opening region corresponding to the red sub-pixel region and the green sub-pixel region.

[0038] In some embodiments, the touch module includes a first touch electrode layer and a second touch electrode layer; the orthographic projection of the first touch electrode layer on the first substrate does not overlap with the orthographic projection of the first opening area on the first substrate, and the orthographic projection of the second touch electrode layer on the first substrate does not overlap with the orthographic projection of the first opening area on the first substrate.

[0039] This disclosure provides a method for manufacturing a touch display panel, comprising:

[0040] A first substrate is provided; the first substrate includes a plurality of sub-pixel regions;

[0041] Multiple light-emitting devices are formed on one side of the first substrate; each light-emitting device corresponds to a sub-pixel area.

[0042] A first pixel definition layer and a plurality of quantum dot layers are formed on the side of the light-emitting device away from the first substrate; the first pixel definition layer includes a first opening region corresponding to a sub-pixel region, and the quantum dot layers are located within at least a portion of the first opening region;

[0043] A stacked insulating structure is formed on the side of the quantum dot layer away from the light-emitting device; the stacked insulating structure includes at least one set of stacked first refractive index layers and a continuous second refractive index layer; the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer; the second refractive index layer is located between the first refractive index layer and the quantum dot layer; a refractive index layer includes a plurality of first refractive index patterns, each of which corresponds one-to-one with a quantum dot layer; the orthogonal projection of the first refractive index pattern onto the first substrate at least covers the orthogonal projection of the quantum dot layer onto the first substrate.

[0044] A first touch electrode layer is formed on the side of the stacked insulating structure away from the quantum dot layer.

[0045] In some embodiments, before forming a stacked insulating structure on the side of the quantum dot layer away from the light-emitting device, the method further includes:

[0046] A first buffer layer is formed on the side of the quantum dot layer away from the light-emitting device;

[0047] A stacked insulating structure is formed on the side of the quantum dot layer away from the light-emitting device, specifically including:

[0048] A second refractive index layer is formed on the side of the first buffer layer away from the quantum dot layer;

[0049] A pattern of the first touch electrode layer is formed on the side of the second refractive index layer opposite to the first buffer layer;

[0050] A first insulating layer is formed on the side of the first touch electrode layer that is opposite to the second refractive index layer, and a patterning process is used on the first insulating layer to form a second opening region that corresponds one-to-one with the quantum dot layer;

[0051] A first refractive index pattern is formed within the second opening region.

[0052] In some embodiments, before the pattern of the first touch electrode layer is formed on the side of the second refractive index layer opposite to the first buffer layer, the method further includes:

[0053] A third refractive index layer is formed on the side of the second refractive index layer away from the first buffer layer; the refractive index of the third refractive index layer is less than that of the second refractive index layer.

[0054] In some embodiments, the quantum dot layer is located within a portion of the first opening region; after forming the first pixel definition layer and multiple quantum dot layers on the side of the light-emitting device facing away from the first substrate, the method further includes:

[0055] A first filling layer is formed in a first opening region outside the quantum dot layer; the orthographic projection of the first refractive index layer on the first substrate and the orthographic projection of the first filling layer on the first substrate do not overlap.

[0056] In some embodiments, after forming a first filling layer within a first opening region outside the quantum dot layer, the method further includes:

[0057] A fifth refractive index layer is formed on the side of the first filling layer away from the light-emitting device; the refractive index of the first buffer layer is different from that of the fifth refractive index layer; the fifth refractive index layer includes a second refractive index pattern that corresponds one-to-one with the first filling layer, the orthographic projection of the second refractive index pattern on the first substrate at least covers the orthographic projection of the first filling layer on the first substrate, and the orthographic projection of the second refractive index pattern on the first substrate and the orthographic projection of the quantum dot layer on the first substrate do not overlap.

[0058] This disclosure provides a display device, including a touch display panel provided in this disclosure. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 This is a schematic diagram of the structure of a touch display device provided in an embodiment of the present disclosure;

[0061] Figure 2 This is a schematic diagram of another touch display device provided in an embodiment of the present disclosure;

[0062] Figure 3 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0063] Figure 4 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0064] Figure 5 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0065] Figure 6 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0066] Figure 7 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0067] Figure 8 This is a schematic diagram of the structure of a mesh-like electrode provided in an embodiment of the present disclosure;

[0068] Figure 9 This is a schematic diagram of another mesh-like electrode provided in an embodiment of the present disclosure;

[0069] Figure 10 This is a schematic diagram of another mesh-like electrode provided in an embodiment of the present disclosure;

[0070] Figure 11 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0071] Figure 12 This is a schematic diagram of the structure of another touch display device provided in an embodiment of the present disclosure;

[0072] Figure 13 This is a schematic flowchart illustrating a method for manufacturing a touch display device according to an embodiment of the present disclosure. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0074] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0075] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this disclosure. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0076] This disclosure provides a touch display panel, such as... Figure 1 As shown, the touch display panel includes:

[0077] The first substrate 1 includes multiple sub-pixel regions 2;

[0078] Multiple light-emitting devices 3 are located on one side of the first substrate 1, corresponding one-to-one with the sub-pixel area 2;

[0079] The first pixel definition layer 4 is located on the side of the light-emitting device 3 away from the first substrate 1, and includes a first opening area 5 corresponding to the sub-pixel area 2.

[0080] Multiple quantum dot layers 6 are located on the side of the light-emitting device 3 away from the first substrate 1, and are located within at least a portion of the first opening region 5;

[0081] The touch module 7 is located on the side of the quantum dot layer 6 away from the light-emitting device 3, and includes the first touch electrode layer M1;

[0082] At least one stacked insulating structure 8 is located between the quantum dot layer 6 and the first touch electrode layer M1, for transmitting light emitted from each quantum dot layer 6 and reflecting light emitted from the light-emitting device 3; the stacked insulating structure 8 includes: a first refractive index layer 9 and a second refractive index layer 10 disposed in the whole layer; the refractive index of the first refractive index layer 9 is less than the refractive index of the second refractive index layer 10; the second refractive index layer 10 is located between the first refractive index layer 9 and the quantum dot layer 6; the first refractive index layer 9 includes a plurality of first refractive index patterns 18, each of which corresponds one-to-one with a quantum dot layer 6; the orthographic projection of the first refractive index pattern 18 onto the first substrate 1 at least covers the orthographic projection of the quantum dot layer 6 onto the first substrate 1.

[0083] It should be noted that in the display panel provided in this embodiment, the quantum dot layer is used to absorb light emitted by the light-emitting device to radiate light of the desired color. Specifically, the color of the light radiated by the quantum dot layer is the same as the color of the sub-pixel area corresponding to the quantum dot layer.

[0084] The display panel provided in this disclosure includes at least one stacked insulating structure. The stacked insulating structure includes a second refractive index layer and a first refractive index layer with different refractive indices stacked on the side of the quantum dot layer facing away from the light-emitting device. The refractive index of the second refractive index layer is greater than that of the first refractive index layer. Light interferes at the interface between the second and first refractive index layers, increasing either the reflectivity or transmittance within a specific wavelength range. Therefore, by setting the refractive indices of the first and second refractive index layers, light emitted from each quantum dot layer can exit through the stacked insulating structure, and light emitted from the light-emitting device can be reflected and reused by the quantum dot layer, thereby improving light utilization and conversion efficiency, and enhancing the front-side light emission efficiency of the touch display panel. It can also reduce light leakage from the light-emitting device and improve the color purity of the display panel. By reducing light leakage from the light-emitting device and improving the color purity of the display panel, the touch display device provided in this disclosure does not require a color filter on the light-emitting side of the quantum dot layer, reducing the thickness of the touch display panel and saving costs. Furthermore, in the display panel provided in this embodiment, the touch module is located on the side of the quantum dot layer away from the light-emitting device, thereby increasing the distance between the touch module and the light-emitting device, avoiding the generation of parasitic capacitance between the touch electrode layer in the touch module and the cathode of the light-emitting device, and improving touch accuracy.

[0085] It should be noted that, Figure 1 The example given is a touch display panel with only one layer of stacked insulating structure. In practice, multiple layers of stacked insulating structures can also be used. The stacking of multiple first reflective mechanisms can also achieve the effect of light passing through each quantum dot layer and reflecting the light emitted by the light-emitting device.

[0086] In some embodiments, such as Figure 1As shown, the touch module 7 also includes: a first buffer layer 19 located between the quantum dot layer 6 and the first touch electrode layer M1, a second touch electrode layer M2 located between the first touch electrode layer M1 and the first buffer layer 19, and a first insulating layer 20 located between the first touch electrode layer M1 and the second touch electrode layer M2.

[0087] The second refractive index layer 10 is located between the first buffer layer 19 and the second touch electrode layer M2;

[0088] The first insulating layer 20 includes a second opening region 27 corresponding to the quantum dot layer 6, and the first refractive index pattern 18 is located within the second opening region 27.

[0089] The touch display panel provided in this embodiment has a stacked insulating structure disposed within the touch module, and the first refractive index pattern is located within the second opening area, meaning the first refractive index pattern and the first insulating layer are located on the same film layer. By providing the stacked insulating structure, placing the first refractive index pattern and the first insulating layer on the same film layer avoids excessively increasing the thickness of the touch module, and consequently, avoids excessively increasing the thickness of the touch display panel.

[0090] In some embodiments, the thickness of the first refractive index pattern is equal to the thickness of the first insulating layer in the direction perpendicular to the first substrate. This reduces the difficulty of fabricating the first refractive index pattern.

[0091] In some embodiments, such as Figure 1 As shown, the touch module 7 also includes a first protective layer 21 located on the side of the first touch electrode layer opposite to the first substrate.

[0092] In some embodiments, the material of the first buffer layer includes silicon nitride (SiN). x ).

[0093] In practice, the thickness of the first buffer layer is greater than or equal to 0.2 micrometers and less than or equal to 0.4 micrometers.

[0094] In some embodiments, the material of the second refractive index layer includes silicon oxynitride (SiNO). x ).

[0095] In some embodiments, when the material of the second refractive index layer includes SiNO x When the refractive index of the second refractive index layer is greater than or equal to 1.65 and less than or equal to 1.75.

[0096] In practical implementation, the material of the first refractive index pattern can be an inorganic material. For example, the material of the first refractive index pattern includes silicon oxide (SiO₂). x ).

[0097] In some embodiments, when the material of the first refractive index pattern includes SiO x When the refractive index of the first refractive index pattern is greater than or equal to 1.45 and less than or equal to 1.55.

[0098] Of course, the materials for the first refractive index pattern can also include aluminum oxide (Al2O3), magnesium fluoride (MgF2), boron oxide (B2O3), etc.

[0099] Alternatively, in specific implementations, the material of the first refractive index pattern can be an organic material. For example, the material of the first refractive index pattern includes one or a combination of the following: acrylic resin, polyurethane resin, silicone resin, and epoxy resin.

[0100] In some embodiments, when the material of the first refractive index pattern includes one or a combination of the following: acrylic resin, polyurethane resin, silicone resin, epoxy resin, the refractive index of the first refractive index pattern is greater than or equal to 1.30 and less than or equal to 1.50.

[0101] In some embodiments, the thickness of the second refractive index layer is less than the thickness of the first refractive index pattern.

[0102] In practical implementation, the thickness of the second refractive index layer is greater than or equal to 0.1 micrometers and less than or equal to 0.2 micrometers. Regardless of whether the material of the first refractive index pattern is inorganic or organic, the thickness of the first refractive index pattern can be set to be greater than or equal to 0.2 micrometers and less than or equal to 0.4 micrometers.

[0103] In some embodiments, such as Figure 2 As shown, the stacked insulation structure 8 also includes:

[0104] The third refractive index layer 28 is located between the first refractive index layer 9 and the second refractive index layer 10; the refractive index of the third refractive index layer 28 is less than the refractive index of the second refractive index layer 10, and the refractive index of the third refractive index layer 28 is not equal to the refractive index of the first refractive index layer 9.

[0105] The display device provided in this embodiment includes a stacked insulating structure further comprising a third refractive index layer located between the first and second refractive index layers. The refractive index of the third refractive index layer is less than that of the second refractive index layer. The refractive index of the third refractive index layer is not equal to that of the first refractive index layer. Light interferes at the interface between the second and third refractive index layers and at the interface between the third and first refractive index layers. This makes it easier to increase the reflectivity or transmittance of light within a specific wavelength range. Consequently, it is easier to reflect the light emitted from each quantum dot layer from the stacked insulating structure. The light emitted from the light-emitting device is reflected, allowing more light emitted from the light-emitting device to be reflected and reused by the quantum dot layer. This can further improve the light utilization rate and conversion rate, enhance the front light emission efficiency of the touch display panel, and improve the color purity of the touch display panel.

[0106] In some embodiments, the third refractive index layer comprises an organic matrix.

[0107] In some embodiments, the organic matrix material includes one or a combination of the following: silane resin, epoxy resin.

[0108] In some embodiments, the refractive index of the third refractive index pattern is greater than or equal to 1.45 and less than or equal to 1.60.

[0109] In some embodiments, the refractive index of the third refractive index layer is less than that of the first refractive index layer.

[0110] In some embodiments, the refractive index of the third refractive index layer is greater than or equal to 1.25 and less than or equal to 1.45.

[0111] In some embodiments, the third refractive index layer further includes hollow particles dispersed in the organic matrix. That is, the third refractive index layer in the touch display panel provided in this disclosure is composed of an organic matrix and hollow particles dispersed in the organic matrix. Adding hollow particles to the organic matrix can reduce the overall refractive index of the film layer, making it easier to achieve a refractive index of the third refractive index layer that is less than that of the second refractive index layer and that the refractive index of the third refractive index layer is not equal to that of the first refractive index layer.

[0112] In some embodiments, the hollow particles have a core-shell structure, with the shell material including silicon dioxide and the core portion enclosed by the shell being air. In specific embodiments, the mass percentage of hollow particles in the organic matrix is ​​greater than or equal to 40% and less than or equal to 70%.

[0113] In practice, the thickness of the third refractive index layer is greater than or equal to 0.1 micrometers and less than or equal to 0.2 micrometers.

[0114] In some embodiments, such as Figure 1 , Figure 2 As shown, the quantum dot layer 6 is located within a portion of the first opening region 5;

[0115] The touch display panel also includes: a plurality of first filling layers 25 located within a first opening area 5 outside the quantum dot layer 6;

[0116] The first refractive index layer 9 and the first filler layer 25 do not overlap in their orthographic projection on the first substrate 1.

[0117] That is, the first opening region without a quantum dot layer is filled by a first filling layer. In specific implementation, the first filling layer is a light-transmitting film layer, and the color of the sub-pixel corresponding to the first filling layer is the color of the light emitted by the light-emitting device.

[0118] In some embodiments, such as Figure 3 , Figure 4 As shown, the touch display panel also includes: a first light-transmitting structure 29, located between the first filling layer 25 and the first touch electrode layer M1, for transmitting light emitted by the light-emitting device 3;

[0119] The first light-transmitting structure 29 includes: a fourth refractive index layer 31, and a fifth refractive index layer 30 located between the fourth refractive index layer 31 and the first filling layer 25; the refractive index of the fourth refractive index layer 31 is different from that of the fifth refractive index layer 30; the fifth refractive index layer 30 includes a second refractive index pattern 32 corresponding to the first filling layer 25, the orthographic projection of the second refractive index pattern 32 on the first substrate 1 at least covers the orthographic projection of the first filling layer 25 on the first substrate 1, and the orthographic projection of the second refractive index pattern 32 on the first substrate 1 does not overlap with the orthographic projection of the quantum dot layer 6 on the first substrate 1.

[0120] The touch display device provided in this embodiment has a first light-transmitting structure between a first filling layer and a first touch electrode layer. The first light-transmitting structure includes a fourth refractive index layer and a fifth refractive index layer with different refractive indices. Light interferes at the interface between the fourth refractive index layer and the fifth refractive index layer. Adjusting the refractive indices of the fourth refractive index layer and the fifth refractive index layer can increase the transmittance of the light emitted by the light-emitting device.

[0121] In some embodiments, such as Figure 3 , Figure 4 As shown, when the touch module 7 includes a first buffer layer 19, the first buffer layer 19 is reused as a fourth refractive index layer 31. This allows for the setting of a first light-transmitting structure that increases the transmittance of light emitted by the light-emitting device while minimizing the increase in the thickness of the touch module, and consequently, the increase in the thickness of the touch display panel. Furthermore, the first buffer layer covering the second refractive index pattern ensures insulation and water / oxygen barrier effects.

[0122] In some embodiments, the material of the fifth refractive index layer is an inorganic material. For example, the inorganic material is SiO₂.x SiO x Its refractive index is greater than or equal to 1.45 and less than or equal to 1.55. Of course, inorganic materials can also be Al2O3, MgF2, B2O3, etc.

[0123] In some embodiments, the thickness of the fifth refractive index layer is greater than or equal to 0.05 micrometers and less than or equal to 0.1 micrometers.

[0124] In some embodiments, such as Figures 1-4 As shown, the second refractive index layer 10, when projected onto the first substrate 1, covers the first filling layer 25, when projected onto the first substrate 1.

[0125] In some embodiments, such as Figure 2 , Figure 4 As shown, when the touch display panel also includes a third refractive index layer 28, the orthographic projection of the third refractive index layer 28 onto the orthographic projection of the first filling layer 25 onto the first substrate 1.

[0126] That is, both the second and third refractive index layers can extend to cover the area corresponding to the first filling layer, and both the second and third refractive index layers can be set as a whole layer. Since the area corresponding to the first filling layer does not have the first refractive index pattern, the second and third refractive index layers will not affect the light emitted by the light-emitting device in the area corresponding to the first filling layer.

[0127] In some embodiments, such as Figures 1 to 4 As shown, the multiple sub-pixel regions 2 include: multiple red sub-pixel regions R, multiple blue sub-pixel regions B, and multiple green sub-pixel regions G.

[0128] In some embodiments, all of the multiple light-emitting devices are blue light-emitting devices; such as Figures 1 to 4 As shown, the quantum dot layer 6 is located only within the first opening region 5 corresponding to the red sub-pixel region R and the green sub-pixel region G.

[0129] Specifically, such as Figures 1 to 4 As shown, a red quantum dot layer r is disposed within the first opening area 5 corresponding to the red sub-pixel area R. The red quantum dot layer r absorbs blue light and radiates red light. A green quantum dot layer g is disposed within the first opening area 5 corresponding to the green sub-pixel area G. The green quantum dot layer g absorbs blue light and radiates green light. Since the light-emitting device is a blue light-emitting device, the blue sub-pixel area B does not need to have a quantum dot layer to enable the touch display panel to achieve full-color display.

[0130] In practical implementation, the materials of the quantum dot layer include core-shell quantum dot structures; the core material in the core-shell quantum dot structure can be, for example, cadmium selenide (CdSe) or indium phosphide (InP), and the shell material in the core-shell quantum dot structure can be, for example, zinc sulfide (ZnS).

[0131] In specific implementation, such as Figures 1 to 4 As shown, the first filling structure 25 is located within the first opening area 5 corresponding to the blue sub-pixel area B.

[0132] In specific implementations, both the first filling structure and the first pixel definition layer can include resin-based materials. The first pixel definition layer includes a light-shielding resin-based material, and the filling structure includes a light-transmitting resin-based material.

[0133] In some embodiments, such as Figures 1-4 As shown, the orthographic projections of the first touch electrode layer M1 and the second touch electrode layer M2 onto the first substrate 1 do not overlap with the orthographic projection of the first opening region 5 onto the first substrate 1.

[0134] Therefore, the first touch electrode layer M1 and the second touch electrode layer M2 will not affect the light emission of the sub-pixels, thus avoiding affecting the normal display of the touch display substrate.

[0135] In some embodiments, the first touch electrode layer and the second touch electrode layer include a plurality of touch electrodes. In specific implementations, such as... Figure 5 , Figure 6 , Figure 7 As shown, the touch electrode includes multiple intersecting touch sensing electrodes RX and multiple touch driving electrodes TX; each touch sensing electrode RX includes multiple touch sensing sub-electrodes 36 and a connecting portion 35 connecting adjacent touch sensing sub-electrodes 36; each touch driving electrode TX includes multiple touch driving sub-electrodes 33 and a bridging electrode 34 connecting adjacent touch driving sub-electrodes 33. In a specific implementation, the touch sensing sub-electrodes 36 and the connecting portion 35 are integrally connected, and the touch sensing sub-electrodes 36, the connecting portion 35, and the touch driving sub-electrodes 33 are arranged in the same layer.

[0136] In some embodiments, Figure 5 In this design, the touch sensing electrode RX extends along a first direction X, and the touch driving electrode TX extends along a second direction Y. The first direction X and the second direction Y intersect, for example, the first direction X is perpendicular to the second direction Y. Of course, in specific implementations, the positions of the touch sensing electrode RX and the touch driving electrode TX can be interchanged.

[0137] It should be noted that, Figure 5 The following example illustrates the use of a rhomboid block electrode as the outline of the touch sensing sub-electrode and the touch driving sub-electrode. In practical implementation, to ensure that the orthographic projections of the first touch electrode layer and the second touch electrode layer on the first substrate do not overlap with the orthographic projection of the first opening area on the first substrate, as follows... Figures 8-10 As shown, both the touch driving electrode and the touch sensing electrode are mesh-shaped electrodes 37.

[0138] In some embodiments, the touch area of ​​the touch display panel coincides with the display area, when both the touch driving electrode and the touch sensing electrode are mesh electrodes 37, such as Figures 8-10 As shown, the mesh electrode 37 includes a plurality of holes 38. For example, the orthographic projection of the holes 38 onto the first substrate corresponds one-to-one with the orthographic projection of the sub-pixel 2 onto the first substrate. In some embodiments, the orthographic projection of the first opening area onto the first substrate falls within the orthographic projection of the hole 38 onto the first substrate. In this way, the touch driving electrode and the touch sensing electrode can be prevented from affecting the light emission of the sub-pixel, thus avoiding affecting the normal display of the touch display substrate.

[0139] It should be noted that, Figures 8-10 The subpixel arrangements are shown separately. Figures 8-10 The image shows only the area corresponding to one pixel, meaning that one pixel comprises three sub-pixels: a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. The area of ​​the luminous region of the red sub-pixel R is larger than the area of ​​the luminous region of the green sub-pixel G, and the area of ​​the luminous region of the green sub-pixel G is larger than the area of ​​the luminous region of the blue sub-pixel B. Figure 8 , Figure 10 In the image, the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are arranged in a rectangular pattern. Figure 9 The red sub-pixel R, green sub-pixel G, and blue sub-pixel B are arranged in a triangle. Figure 8 In the image, the red sub-pixel R emitting area, the green sub-pixel G emitting area, and the blue sub-pixel B emitting area are all quadrilateral in shape, and the hole 38 is also quadrilateral in shape. Figure 9 In the image, the red sub-pixel R emitting area, the green sub-pixel G emitting area, and the blue sub-pixel B emitting area are octagonal in shape, and correspondingly, the hole 38 is also octagonal in shape. Figure 10 In the diagram, the red sub-pixel R emitting area, the green sub-pixel G emitting area, and the blue sub-pixel B emitting area are quadrilaterals. The shape of hole 38 is also approximately quadrilateral; for example, hole 38 is a quadrilateral with curved edges. In practical implementation... Figure 8 , Figure 9 In the middle, the grid of the grid electrode is linear. Figure 10 The grid of the medium-grid electrode is curved.

[0140] In specific implementation, the materials of the first touch electrode layer and the second touch electrode layer include titanium / aluminum / titanium stack; the material of the first protective layer includes polyimide (PI).

[0141] In practical implementation, in the titanium / aluminum / titanium stack, the thickness of titanium is, for example, greater than or equal to 30 nanometers (nm) and less than or equal to 50 nm, and the thickness of aluminum is, for example, greater than or equal to 100 nm and less than or equal to 300 nm. The thickness of the first insulating layer is, for example, greater than or equal to 0.2 micrometers and less than or equal to 0.4 micrometers. The thickness of the first protective layer is, for example, greater than or equal to 1 micrometer and less than or equal to 2 micrometers.

[0142] In some embodiments, the light-emitting device is an electroluminescent device. An electroluminescent device is, for example, an organic light-emitting diode (OLED). Alternatively, the electroluminescent device may be other light-emitting devices such as Micro LEDs or Mini LEDs.

[0143] The following example uses OLED as the light-emitting device.

[0144] In some embodiments, such as Figures 1-4 As shown, the touch display panel further includes: a driving circuit layer 22 located between the first substrate 1 and the light-emitting device 3; a second pixel definition layer 23 located between the driving circuit layer 22 and the first pixel definition layer 4; an encapsulation layer 14 located between the light-emitting device 3 and the first pixel definition layer 4; and a first planarization layer 26 located between the first pixel definition layer 4 and the first buffer layer 19. The second pixel definition layer 23 includes a third opening region 24 corresponding to each sub-pixel region 2; the light-emitting device 3 includes an anode 11, a light-emitting functional layer 12, and a cathode 13 sequentially stacked in the third opening region 24, wherein the anode 11 is located between the second pixel definition layer 23 and the driving circuit layer 22, the second pixel definition layer 23 covers the edge of the anode 11, and the cathodes 13 corresponding to the plurality of sub-pixel regions 2 are integrally connected. In some embodiments, the display panel may further include a light-harvesting layer located between the cathode and the encapsulation layer.

[0145] In practical implementation, the driving circuit layer includes multiple pixel driving circuits arranged in an array; the pixel driving circuits are used to drive the light-emitting devices to emit light; such as Figure 11 As shown, the pixel driving circuit includes a thin-film transistor (TFT) and a storage capacitor (not shown); the thin-film transistor (TFT) includes: an active layer 122, a gate G, a source S, and a drain D; Figure 11 This example uses a thin-film transistor (TFT) with a top-gate structure, but a TFT can also have a bottom-gate or other structures. Figure 11 As shown, the display substrate further includes a second buffer layer 40 located between the first substrate 1 and the active layer 39; the driving circuit layer 22 further includes a first gate insulating layer 41 located between the active layer 39 and the gate G, an interlayer insulating layer 42 located between the first gate insulating layer 41 and the source S and drain D, and a second planarization layer 38 located between the light-emitting device 3 and the source S and drain D. The anode 11 is connected to the drain D through a via penetrating the second planarization layer 38.

[0146] In practical implementation, the light-emitting functional layer includes an organic light-emitting layer, and may also include an electron injection layer, an electron transport layer, a hole transport layer, a hole injection layer, etc.

[0147] In practical implementation, when all light-emitting devices are blue light-emitting devices, the organic light-emitting layers corresponding to each sub-pixel region emit blue light, but the emission spectra of the organic light-emitting layers corresponding to each sub-pixel region may be the same or different.

[0148] In some embodiments, such as Figures 1-4 As shown, the encapsulation layer 14 includes: a first inorganic encapsulation film 15, an organic encapsulation film 16, and a second inorganic encapsulation film 17 stacked together.

[0149] It should be noted that, Figures 1-4 The following explanation uses the direct fabrication of a quantum dot layer and a first pixel definition layer on encapsulation layer 14 as an example. In specific implementation, such as... Figure 12 As shown, a display substrate 43 including the light-emitting device 3 and a color transfer substrate 44 including the quantum dot layer 6 and the first pixel definition layer 4 can be fabricated separately, and then the display substrate and the color transfer substrate are bonded together using a cell assembly process. Figure 12 As shown, the color transfer substrate 44 also includes a second substrate 45 and a capping layer 46; the second substrate 45 is located on the side of the quantum dot layer 6 away from the encapsulation layer 14, and the capping layer 46 is located between the quantum dot layer 6 and the encapsulation layer 14. The touch display device also includes an adhesive layer 47 located between the display substrate 43 and the color transfer substrate 44. In a specific implementation, for a scheme where the display substrate and the color transfer substrate are bonded together using a cell bonding process, the first buffer layer 19 is located on the side of the second substrate 45 away from the quantum dot layer 6.

[0150] Next, taking a case where multiple light-emitting devices are all blue light-emitting devices and the quantum dot layer is only located in the first opening area corresponding to the red and green sub-pixel areas as an example, the simulation results of touch display panels a, b, c, d, and e are introduced as shown in Table 1. Touch display panel a is a panel excluding the stacked insulating structure and the first light-transmitting structure; that is, the touch module only includes a first buffer layer, a second touch electrode layer, a first insulating layer, a first touch electrode layer, and a first protective layer stacked sequentially. The structure of touch display panel b is as follows... Figure 1 As shown, the structures of touch display panels c and d are as follows: Figure 2 As shown, the structure of the touch display panel e is as follows: Figure 4 As shown. In the touch display panels b, c, d, and e, the material of the first buffer layer is SiN. x SiN x The thickness is greater than or equal to 0.2 micrometers and less than or equal to 0.4 micrometers, and the material of the first refractive index layer is SiO2. x SiOx The refractive index is greater than or equal to 1.45 and less than or equal to 1.55, SiO x The thickness of the second refractive index layer is greater than or equal to 0.2 micrometers and less than or equal to 0.4 micrometers, and the material of the second refractive index layer is SiNO. x SiNO x The refractive index of SiNO is greater than or equal to 1.65 and less than or equal to 1.75. x The thickness of the third refractive index layer is greater than or equal to 0.1 micrometers and less than or equal to 0.2 micrometers; in touch display panels b and c, the organic matrix material of the third refractive index layer is silane resin or epoxy resin; the refractive index of the third refractive index layer in touch display panel b is greater than or equal to 1.45 and less than or equal to 1.60; the refractive index of the third refractive index layer in touch display panel c is greater than or equal to 1.25 and less than or equal to 1.45; in touch display panel e, the material of the fifth refractive index layer is SiO2. x SiO x The refractive index is greater than or equal to 1.45 and less than or equal to 1.55, SiO x The thickness is greater than or equal to 0.05 micrometers and less than or equal to 0.1 micrometers. In Table 1, Rx, Ry, Gx, Gy, Bx, and By represent color coordinates, and R_Eff, G_Eff, B_Eff, and W_Eff represent luminous efficacy. According to Table 1, since the embodiments of this disclosure have a stacked insulating structure, the unused blue light reflection can be used to excite the quantum dot layer to emit light again. Therefore, compared with touch display panel a without a stacked insulating structure, the touch display panels b, c, d, and e provided in the embodiments of this disclosure have significantly improved color purity and color gamut. Furthermore, the unused blue light reflection excites the quantum dot layer to emit light again, which increases the conversion rate of the quantum dot layer. Therefore, the luminous efficacy of R_Eff, G_Eff, and W_Eff is improved. The color gamut of touch display panels b, c, d, and e provided in the embodiments of this disclosure gradually increases. In addition, since touch display panel e also has a first light-transmitting structure to improve blue light transmittance, the blue light efficacy B_Eff can be improved.

[0151] Table 1

[0152]

[0153]

[0154] Based on the same inventive concept, this disclosure also provides a method for manufacturing a touch display panel, such as... Figure 13 As shown, it includes:

[0155] S101, A first substrate is provided; the first substrate includes a plurality of sub-pixel regions;

[0156] S102, A plurality of light-emitting devices are formed on one side of the first substrate; each light-emitting device corresponds to a sub-pixel area.

[0157] S103. A first pixel definition layer and a plurality of quantum dot layers are formed on the side of the light-emitting device away from the first substrate; the first pixel definition layer includes a first opening region corresponding to each sub-pixel region, and the quantum dot layers are located within at least a portion of the first opening region;

[0158] S104. A stacked insulating structure is formed on the side of the quantum dot layer away from the light-emitting device; the stacked insulating structure includes at least one set of stacked first refractive index layers and a whole layer of second refractive index layers; the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer; the second refractive index layer is located between the first refractive index layer and the quantum dot layer; the first refractive index layer includes a first refractive index pattern that corresponds one-to-one with the quantum dot layer; the orthogonal projection of the first refractive index pattern on the first substrate at least covers the orthogonal projection of the quantum dot layer on the first substrate;

[0159] S105. A first touch electrode layer is formed on the side of the stacked insulating structure away from the quantum dot layer.

[0160] The method for fabricating a touch display panel provided in this disclosure involves forming at least one stacked insulating structure on the side of the quantum dot layer away from the light-emitting device layer. The stacked insulating structure includes a second refractive index layer and a first refractive index layer with different refractive indices stacked on the side of the quantum dot layer away from the light-emitting device, wherein the refractive index of the second refractive index layer is greater than that of the first refractive index layer. Light interferes at the interface between the second and first refractive index layers, increasing either the reflectivity or transmittance within a specific wavelength range. By setting the refractive indices of the first and second refractive index layers, light emitted from each quantum dot layer can exit through the stacked insulating structure, and light emitted from the light-emitting device can be reflected and reused by the quantum dot layer, thereby improving light utilization and conversion efficiency, and enhancing the front-side light emission efficiency of the touch display panel. It also reduces light leakage from the light-emitting device, improving the color purity of the display panel. By reducing light leakage from the light-emitting device and improving the color purity of the display panel, a color filter does not need to be formed on the light-emitting side of the quantum dot layer, reducing the thickness of the touch display panel and saving on process steps and costs. Furthermore, since the touch module is located on the side of the quantum dot layer away from the light-emitting device, the distance between the touch module and the light-emitting device can be increased, avoiding the generation of parasitic capacitance between the touch electrode layer in the touch module and the cathode of the light-emitting device, which can improve touch accuracy.

[0161] In some embodiments, before forming a plurality of light-emitting devices on one side of the first substrate, the method further includes:

[0162] A pattern of a second buffer layer, an active layer, a first gate insulating layer, a gate, an interlayer insulating layer, a source and a drain, and a second planarization layer is sequentially formed on one side of the first substrate.

[0163] Multiple light-emitting devices are formed on one side of the first substrate, specifically including:

[0164] Multiple anode patterns are formed on the side of the second planarization layer opposite to the first substrate.

[0165] A second pixel definition layer is formed on the side of the anode away from the second planarization layer, and a patterning process is performed on the second pixel definition layer to form a third opening area corresponding to the anode; the third opening area exposes the anode;

[0166] A pattern of a light-emitting functional layer is formed in the third opening region;

[0167] A cathode is formed on the side of the light-emitting functional layer opposite to the anode;

[0168] After forming multiple light-emitting devices on one side of the first substrate, the method further includes:

[0169] A first inorganic encapsulation film, an organic encapsulation film, and a second inorganic encapsulation film are sequentially formed on the side of the cathode away from the light-emitting functional layer.

[0170] In some embodiments, a first pixel definition layer and a plurality of quantum dot layers are formed on the side of the light-emitting device facing away from the first substrate, specifically including:

[0171] A first pixel definition layer is formed on the side of the second inorganic encapsulation film away from the organic encapsulation film, and a patterning process is performed on the first pixel definition layer to form multiple first opening regions;

[0172] A quantum dot layer is formed in at least part of the first opening region.

[0173] In some embodiments, after forming the quantum dot layer within at least a portion of the first opening region, the method further includes:

[0174] A first planarization layer is formed that covers the quantum dot layer and the first pixel definition layer.

[0175] Alternatively, in some embodiments, a first pixel definition layer and multiple quantum dot layers are formed on the side of the light-emitting device facing away from the first substrate, specifically including:

[0176] A second substrate is provided, and a first pixel definition layer is formed on one side of the second substrate. The first pixel definition layer is patterned to form a plurality of first opening regions.

[0177] A quantum dot layer is formed within at least a portion of the first opening region;

[0178] A capping layer covering the quantum dot layer and the first pixel definition layer is formed to obtain a color transfer substrate;

[0179] The color transfer substrate is bonded to the display substrate, which includes the light-emitting devices, using a cell-fitting process.

[0180] Specifically, for example, by bonding the capping layer and the encapsulation layer with an adhesive layer, the color conversion substrate and the display substrate including the light-emitting device are bonded together.

[0181] In some embodiments, before forming a stacked insulating structure on the side of the quantum dot layer away from the light-emitting device, the method further includes:

[0182] A first buffer layer is formed on the side of the quantum dot layer away from the light-emitting device;

[0183] A stacked insulating structure is formed on the side of the quantum dot layer away from the light-emitting device, specifically including:

[0184] A second refractive index layer is formed on the side of the first buffer layer away from the quantum dot layer;

[0185] A pattern for a second touch electrode layer is formed on the side of the second refractive index layer opposite to the first buffer layer;

[0186] A first insulating layer is formed on the side of the second touch electrode layer that is opposite to the second refractive index layer, and a patterning process is used on the first insulating layer to form a second opening region that corresponds one-to-one with the quantum dot layer;

[0187] A first refractive index pattern is formed within the second opening region.

[0188] In practical implementation, for example, plasma-enhanced chemical vapor deposition (PECVD) is used to deposit SiN. x This forms the first buffer layer.

[0189] In practical implementation, for example, SiNO is deposited using the PECVD process. x This forms a second refractive index layer.

[0190] In practical implementation, for example, the pattern of the second touch electrode layer can be formed by sputtering titanium / aluminum / titanium sequentially.

[0191] In practical implementation, for example, SiN can be deposited using PECVD process. x The first insulating layer is formed, and then the first insulating layer is patterned using processes such as exposure, development, and etching to form the second opening area.

[0192] In specific implementation, when the material included in the first refractive index pattern is an inorganic material, for example, a PECVD process combined with metal mask technology can be used to form the first refractive index pattern in the second opening area; when the material included in the first refractive index pattern is an organic material, for example, an inkjet printing process combined with metal mask technology can be used to form the first refractive index pattern in the second opening area.

[0193] In some embodiments, after forming the first touch electrode layer on the side of the stacked insulating structure away from the quantum dot layer, the method further includes:

[0194] A first protective layer is formed on the side of the first touch electrode layer that is away from the first substrate.

[0195] In some embodiments, before the pattern of the first touch electrode layer is formed on the side of the second refractive index layer opposite to the first buffer layer, the method further includes:

[0196] A third refractive index layer is formed on the side of the second refractive index layer away from the first buffer layer; the refractive index of the third refractive index layer is less than that of the second refractive index layer.

[0197] In practical implementation, for example, an organic material can be spin-coated onto the side of the second refractive index layer away from the first buffer layer to form a third refractive index layer. The organic material can be a silane resin, epoxy resin, etc. Alternatively, hollow particles can be doped into the organic material, and the spin-coated organic material doped with hollow particles can form the third refractive index layer.

[0198] In some embodiments, the quantum dot layer is located within a portion of the first opening region; after forming the first pixel definition layer and multiple quantum dot layers on the side of the light-emitting device facing away from the first substrate, the method further includes:

[0199] A first filling layer is formed in a first opening region outside the quantum dot layer; the orthographic projection of the first refractive index layer on the first substrate and the orthographic projection of the first filling layer on the first substrate do not overlap.

[0200] In some embodiments, after forming a first filling layer within a first opening region outside the quantum dot layer, the method further includes:

[0201] A fifth refractive index layer is formed on the side of the first filling layer away from the light-emitting device; the refractive index of the first buffer layer is different from that of the fifth refractive index layer; the fifth refractive index layer includes a second refractive index pattern that corresponds one-to-one with the first filling layer, the orthographic projection of the second refractive index pattern on the first substrate at least covers the orthographic projection of the first filling layer on the first substrate, and the orthographic projection of the second refractive index pattern on the first substrate and the orthographic projection of the quantum dot layer on the first substrate do not overlap.

[0202] In practice, PECVD technology combined with metal mask technology can be used to form a second refractive index pattern in the region corresponding to the first opening outside the quantum dot layer.

[0203] This disclosure provides a display device, including a touch display panel provided in this disclosure.

[0204] The display device provided in this disclosure includes any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting this disclosure. Implementation of this display device can refer to the above-described embodiments of the touch display panel; repeated details will not be elaborated upon.

[0205] In summary, the present disclosure provides a touch display panel, its fabrication method, and a display device. The touch display panel includes at least one stacked insulating structure. This stacked insulating structure includes a second refractive index layer and a first refractive index layer with different refractive indices stacked on the side of the quantum dot layer facing away from the light-emitting device. The refractive index of the second refractive index layer is greater than that of the first refractive index layer. Light interferes at the interface between the second and first refractive index layers, increasing either the reflectivity or transmittance within a specific wavelength range. Therefore, by setting the refractive indices of the first and second refractive index layers, light emitted from each quantum dot layer can exit through the stacked insulating structure, and light emitted from the light-emitting device can be reflected and reused by the quantum dot layer, thereby improving light utilization and conversion efficiency, and enhancing the front-side light emission efficiency of the touch display panel. It also reduces light leakage from the light-emitting device, improving the color purity of the display panel. By reducing light leakage from the light-emitting device and improving the color purity of the display panel, the touch display device provided in this disclosure does not require a color filter on the light-emitting side of the quantum dot layer, reducing the thickness of the touch display panel and saving costs. Furthermore, in the display panel provided in this embodiment, the touch module is located on the side of the quantum dot layer away from the light-emitting device, thereby increasing the distance between the touch module and the light-emitting device, avoiding the generation of parasitic capacitance between the touch electrode layer in the touch module and the cathode of the light-emitting device, and improving touch accuracy.

[0206] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0207] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations to the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A touch display panel, wherein, The touch display panel includes: The first substrate includes multiple sub-pixel regions; Multiple light-emitting devices are located on one side of the first substrate, corresponding one-to-one with the sub-pixel areas; The first pixel definition layer is located on the side of the light-emitting device away from the first substrate, and includes a first opening area corresponding to each of the sub-pixel areas; Multiple quantum dot layers are located on the side of the light-emitting device opposite to the first substrate and are located within at least a portion of the first opening region; A touch module is located on the side of the quantum dot layer opposite to the light-emitting device, and includes a first touch electrode layer; A stacked insulating structure is located between the quantum dot layer and the first touch electrode layer. The stacked insulating structure includes: a first refractive index layer and a second refractive index layer integrally disposed thereon; the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer; the second refractive index layer is located between the first refractive index layer and the quantum dot layer; the first refractive index layer includes a plurality of first refractive index patterns, each of which corresponds one-to-one with the quantum dot layer; the orthographic projection of the first refractive index pattern onto the first substrate at least covers the orthographic projection of the quantum dot layer onto the first substrate. The touch module further includes: a first buffer layer located between the quantum dot layer and the first touch electrode layer, a second touch electrode layer located between the first touch electrode layer and the first buffer layer, and a first insulating layer located between the first touch electrode layer and the second touch electrode layer; The second refractive index layer is located between the first buffer layer and the second touch electrode layer; The first insulating layer includes a second opening region corresponding to the quantum dot layer, and the first refractive index pattern is located within the second opening region.

2. The touch display panel according to claim 1, wherein, In the direction perpendicular to the first substrate, the thickness of the first refractive index pattern is equal to the thickness of the first insulating layer.

3. The touch display panel according to any one of claims 1 to 2, wherein, The material of the first refractive index pattern includes silicon oxide.

4. The touch display panel according to claim 3, wherein, The refractive index of the first refractive index pattern is greater than or equal to 1.45 and less than or equal to 1.

55.

5. The touch display panel according to any one of claims 1 to 2, wherein, The material of the first refractive index pattern includes one or a combination of the following: acrylic resin, polyurethane resin, silicone resin, and epoxy resin.

6. The touch display panel according to claim 5, wherein, The refractive index of the first refractive index pattern is greater than or equal to 1.30 and less than or equal to 1.

50.

7. The touch display panel according to any one of claims 1 to 2, 4, and 6, wherein, The material of the second refractive index layer includes silicon oxynitride.

8. The touch display panel according to claim 7, wherein, The refractive index of the second refractive index layer is greater than or equal to 1.65 and less than or equal to 1.

75.

9. The touch display panel according to any one of claims 1 to 2, 4, 6, and 8, wherein, The stacked insulation structure further includes: A third refractive index layer is located between the first refractive index layer and the second refractive index layer; the refractive index of the third refractive index layer is less than that of the second refractive index layer, and the refractive index of the third refractive index layer is different from that of the first refractive index layer.

10. The touch display panel according to claim 9, wherein, The third refractive index layer comprises an organic matrix.

11. The touch display panel according to claim 10, wherein, The organic matrix material includes one or a combination of the following: silane resin, epoxy resin.

12. The touch display panel according to claim 11, wherein, The refractive index of the third refractive index layer is greater than or equal to 1.45 and less than or equal to 1.

60.

13. The touch display panel according to claim 11, wherein, The refractive index of the third refractive index layer is less than that of the first refractive index layer.

14. The touch display panel according to claim 13, wherein, The refractive index of the third refractive index layer is greater than or equal to 1.25 and less than or equal to 1.

45.

15. The touch display panel according to any one of claims 10 to 14, wherein, The third refractive index layer also includes hollow particles dispersed in the organic matrix.

16. The touch display panel according to any one of claims 1 to 2, 4, 6, 8, 10 to 14, wherein, The quantum dot layer is located within a portion of the first opening region; The touch display panel further includes: a plurality of first filling layers located within the first opening area outside the quantum dot layer; The orthographic projection of the first refractive index layer onto the first substrate does not overlap with the orthographic projection of the first filler layer onto the first substrate.

17. The touch display panel according to claim 16, wherein, The touch display panel further includes: a first light-transmitting structure located between the first filling layer and the touch electrode layer, for transmitting light emitted by the light-emitting device; The first light-transmitting structure includes: a fourth refractive index layer, and a fifth refractive index layer located between the fourth refractive index layer and the first filling layer; the refractive index of the fourth refractive index layer is different from that of the fifth refractive index layer; the fifth refractive index layer includes a second refractive index pattern corresponding to the first filling layer, the orthographic projection of the second refractive index pattern on the first substrate at least covers the orthographic projection of the first filling layer on the first substrate, and the orthographic projection of the second refractive index pattern on the first substrate does not overlap with the orthographic projection of the quantum dot layer on the first substrate.

18. The touch display panel according to claim 17, wherein, The touch module includes a first buffer layer, which is reused as the fourth refractive index layer.

19. The touch display panel according to claim 18, wherein, The orthographic projection of the second refractive index layer onto the first substrate covers the orthographic projection of the first filler layer onto the first substrate.

20. The touch display panel according to claim 19, wherein, The touch display panel further includes a third refractive index layer, the orthographic projection of the third refractive index layer onto the first substrate covers the orthographic projection of the first filling layer onto the first substrate.

21. The touch display panel according to any one of claims 17 to 20, wherein, The plurality of light-emitting devices are blue light-emitting devices; the plurality of sub-pixel regions include: a plurality of red sub-pixel regions, a plurality of blue sub-pixel regions, and a plurality of green sub-pixel regions; The quantum dot layer is located only within the first opening region corresponding to the red sub-pixel region and the green sub-pixel region.

22. The touch display panel according to any one of claims 1 to 2, 4, 6, 8, 10 to 14, 17 to 20, wherein, The touch module includes a first touch electrode layer and a second touch electrode layer; the orthographic projection of the first touch electrode layer onto the first substrate does not overlap with the orthographic projection of the first opening area onto the first substrate, and the orthographic projection of the second touch electrode layer onto the first substrate does not overlap with the orthographic projection of the first opening area onto the first substrate.

23. A method for manufacturing a touch display panel, wherein, The method includes: A first substrate is provided; the first substrate includes a plurality of sub-pixel regions; Multiple light-emitting devices are formed on one side of the first substrate; each light-emitting device corresponds to a sub-pixel region. A first pixel definition layer and a plurality of quantum dot layers are formed on the side of the light-emitting device away from the first substrate; the first pixel definition layer includes a first opening region corresponding to each of the sub-pixel regions, and the quantum dot layers are located within at least a portion of the first opening region; At least one stacked insulating structure is formed on the side of the quantum dot layer away from the light-emitting device; the stacked insulating structure includes at least one set of stacked first refractive index layers and a continuous second refractive index layer; the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer; the second refractive index layer is located between the first refractive index layer and the quantum dot layer; each refractive index layer includes a plurality of first refractive index patterns, each first refractive index pattern corresponding one-to-one with the quantum dot layer; the orthogonal projection of the first refractive index pattern onto the first substrate at least covers the orthogonal projection of the quantum dot layer onto the first substrate; A first touch electrode layer is formed on the side of the stacked insulating structure opposite to the quantum dot layer; Before forming a stacked insulating structure on the side of the quantum dot layer away from the light-emitting device, the method further includes: A first buffer layer is formed on the side of the quantum dot layer opposite to the light-emitting device; A stacked insulating structure is formed on the side of the quantum dot layer opposite to the light-emitting device, specifically including: A second refractive index layer is formed on the side of the first buffer layer opposite to the quantum dot layer; A pattern of a first touch electrode layer is formed on the side of the second refractive index layer opposite to the first buffer layer; A first insulating layer is formed on the side of the first touch electrode layer that is opposite to the second refractive index layer, and a patterning process is used on the first insulating layer to form a second opening region that corresponds one-to-one with the quantum dot layer. The first refractive index pattern is formed within the second opening region.

24. The method according to claim 23, wherein, Before the pattern of the first touch electrode layer is formed on the side of the second refractive index layer opposite to the first buffer layer, the process further includes: A third refractive index layer is formed on the side of the second refractive index layer away from the first buffer layer; the refractive index of the third refractive index layer is less than that of the second refractive index layer.

25. The method according to any one of claims 23-24, wherein, The quantum dot layer is located within a portion of the first opening region; After forming a first pixel definition layer and multiple quantum dot layers on the side of the light-emitting device opposite to the first substrate, the method further includes: A first filling layer is formed within the first opening region outside the quantum dot layer; The orthographic projection of the first refractive index layer onto the first substrate does not overlap with the orthographic projection of the first filler layer onto the first substrate.

26. The method of claim 25, wherein, After forming a first filling layer within the first opening region outside the quantum dot layer, the method further includes: A fifth refractive index layer is formed on the side of the first filling layer away from the light-emitting device; the refractive index of the first buffer layer is different from that of the fifth refractive index layer; the fifth refractive index layer includes a second refractive index pattern that corresponds one-to-one with the first filling layer, the orthographic projection of the second refractive index pattern on the first substrate at least covers the orthographic projection of the first filling layer on the first substrate, and the orthographic projection of the second refractive index pattern on the first substrate does not overlap with the orthographic projection of the quantum dot layer on the first substrate.

27. A display device, wherein, Includes the touch display panel according to any one of claims 1 to 22.

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