Touch display panel and touch display device

Abstract

Disclosed are a touch display panel and a touch display device. The touch display panel comprises: a display substrate comprising a plurality of pixel regions and a spacing region spacing the plurality of pixel regions from each other; a black matrix located on the light-emitting side of the display substrate, and the orthographic projection of the black matrix on the display substrate is located in the spacing region; and a touch structure layer comprising a first touch pattern layer located on the light-emitting side of the display substrate; the first touch pattern layer comprises a plurality of first metal lines, the orthographic projection of the first metal lines on the display substrate is located in the range of the orthographic projection of the black matrix on the display substrate, and the first metal lines are in contact with the black matrix.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular to a touch display panel and a touch display device. BACKGROUND

[0002] Organic Light-Emitting Diode (OLED) panel has been widely concerned due to its self-luminous, low power consumption, thinness, flexibility, bright colors, high contrast, fast response rate and other advantages. In some products, a Color Filter on Encapsulation (COE) is formed on the encapsulation layer of the organic light-emitting diode, so that no polarizer needs to be set to resist reflection. In addition, in some products, a touch structure layer is arranged outside the color filter to realize touch, so that a multi-functional layer stacked film layer structure can be formed. SUMMARY

[0003] The present disclosure provides a touch display panel and a touch display device.

[0004] The present disclosure provides a touch display panel, comprising:

[0005] a display substrate comprising a plurality of pixel regions and a plurality of interval regions spacing the plurality of pixel regions from each other;

[0006] a black matrix located on a light-out side of the display substrate, and a normal projection of the black matrix on the display substrate is located in the interval regions;

[0007] a touch structure layer comprising a first touch pattern layer located on the light-out side of the display substrate; the first touch pattern layer comprises a plurality of first metal lines, a normal projection of the first metal lines on the display substrate is located in a range of the normal projection of the black matrix on the display substrate, and the first metal lines are in contact with the black matrix.

[0008] In some embodiments, the black matrix adopts a black single-layer structure.

[0009] In some embodiments, the touch display panel further comprises a plurality of pixel filter parts, colors of the plurality of pixel filter parts comprise a plurality of colors, and each of the pixel filter parts is arranged opposite to one of the pixel regions of the display substrate.

[0010] The black matrix comprises a first filter pattern and a second filter pattern, the first filter pattern is located on a side of the first touch pattern layer away from the display substrate, the second filter pattern is located on a side of the first filter pattern away from the display substrate, and the orthographic projection of the first filter pattern and the orthographic projection of the second filter pattern on the display substrate both cover the orthographic projection of the first touch pattern layer on the display substrate; the first filter pattern comprises a plurality of first filter portions, and the second filter pattern comprises a plurality of second filter portions, the first filter portions and the second filter portions are arranged opposite to each other in a one-to-one correspondence;

[0011] The materials of each first filter portion and the corresponding second filter portion are respectively the same as the materials of the pixel filter portions of two colors.

[0012] In some embodiments, the black matrix further comprises a light shielding portion, the light shielding portion is a black single-layer structure and has a through hole, the first metal wire and at least a part of the first filter pattern are located in the through hole, and the first metal wire and the light shielding portion are spaced apart by the first filter pattern.

[0013] In some embodiments, at least a part of the second filter pattern is located outside the through hole, and a part of the orthographic projection of the second filter pattern on the display substrate exceeds the orthographic projection of the through hole on the display substrate.

[0014] In some embodiments, the colors of the plurality of first filter portions of the first filter pattern are the same; or the colors of at least two first filter portions are different.

[0015] The colors of the plurality of second filter portions of the second filter pattern are the same; or the colors of at least two second filter portions are different.

[0016] In some embodiments, the first touch pattern layer is located on a side of the black matrix close to the display substrate; the touch structure layer further comprises:

[0017] A second touch pattern layer is located on a side of the black matrix away from the display substrate and comprises a plurality of second metal wires, and the orthographic projection of the plurality of second metal wires on the display substrate is located within the orthographic projection of the black matrix on the display substrate.

[0018] In some embodiments, the refractive index of the second metal wire away from the surface of the display substrate is less than 5%.

[0019] In some embodiments, the touch display panel further comprises a cover layer, and the orthographic projection of the cover layer on the display substrate covers each pixel area.

[0020] The black matrix has a first surface facing away from the display substrate, a second surface facing the display substrate, and a side surface connecting between the first surface and the second surface, the side surface of the black matrix includes a first sub-side surface in contact with the cover layer, a portion of the black matrix close to the first sub-side surface has a refractive index less than that of the cover layer, so that at least part of the light rays irradiated by the display substrate to the first sub-side surface are reflected by the first sub-side surface in a direction away from the display panel.

[0021] In some embodiments, the cover layer is a continuous film layer.

[0022] Alternatively, the cover layer includes a plurality of cover portions arranged at intervals, and each cover portion covers at least one pixel region in orthographic projection on the display substrate.

[0023] In some embodiments, the first touch pattern layer is located on one side of the black matrix close to the display panel, and the touch display panel further includes:

[0024] A second touch pattern layer is located on one side of the first touch pattern layer close to the display substrate, and includes a plurality of second metal lines, the orthographic projection of the plurality of second metal lines on the display substrate is located in the orthographic projection range of the black matrix on the display substrate.

[0025] An insulating layer is located between the first touch pattern layer and the second touch pattern layer, and the orthographic projection of the insulating layer on the display substrate is located in the interval region.

[0026] In some embodiments, the touch display panel further includes a cover layer, and the orthographic projection of the cover layer on the display substrate covers each pixel region,

[0027] The insulating layer has a first surface facing away from the display substrate, a second surface facing the display substrate, and a side surface connecting between the first surface and the second surface, the side surface of the insulating layer includes a first sub-side surface in contact with the cover layer, and the refractive index of the insulating layer is less than that of the second cover layer, so that at least part of the light rays irradiated by the display substrate to the first sub-side surface are reflected by the first sub-side surface in a direction away from the display substrate.

[0028] In some embodiments, the cover layer is a continuous film layer.

[0029] Alternatively, the cover layer includes a plurality of cover portions arranged at intervals, and each cover portion covers at least one pixel region in orthographic projection on the display substrate.

[0030] In some embodiments, the touch display panel further comprises: a plurality of pixel filter parts, each of the pixel filter parts is arranged opposite to one of the pixel regions of the display substrate;

[0031] The display substrate comprises:

[0032] A substrate substrate;

[0033] A plurality of light emitting devices, arranged on the substrate substrate, each of the pixel regions is provided with one of the light emitting devices;

[0034] An encapsulation layer, arranged on a side of the light emitting device away from the substrate substrate;

[0035] Among them, the plurality of pixel filter parts are in contact with the encapsulation layer.

[0036] In some embodiments, the encapsulation layer comprises: a first inorganic encapsulation sub-layer, an organic encapsulation sub-layer and a second inorganic encapsulation sub-layer arranged in sequence in a direction away from the substrate substrate;

[0037] Among them, the second inorganic encapsulation sub-layer is a continuous film layer, the orthographic projection of which on the display substrate covers the plurality of pixel regions, and the plurality of pixel filter parts are in contact with the second inorganic encapsulation sub-layer;

[0038] Or, the second inorganic encapsulation sub-layer has a plurality of hollow parts, the hollow parts correspond one-to-one to the pixel regions, and at least part of the filter parts is in contact with the organic encapsulation sub-layer through the hollow parts.

[0039] The present disclosure also provides a touch display device comprising the above touch display panel. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0041] FIG. 1A A schematic diagram of a touch display panel provided in some embodiments of the present disclosure.

[0042] FIG. 1B A schematic diagram of the area division of a display substrate provided in some embodiments of the present disclosure.

[0043] FIG. 2A A schematic diagram of a touch display panel provided in some embodiments of the present disclosure.

[0044] FIG. 2B A bottom view of a first filter pattern and a second filter pattern provided in some embodiments of the present disclosure.

[0045] FIG. 2C A schematic view of a touch display panel provided in some other embodiments of the present disclosure.

[0046] FIG. 3 A schematic view of a touch display panel provided in some other embodiments of the present disclosure.

[0047] FIG. 4 A schematic view of a touch display panel provided in some other embodiments of the present disclosure.

[0048] FIG. 5 A schematic view of a touch display panel provided in some other embodiments of the present disclosure.

[0049] FIG. 6 A schematic view of a touch display panel provided in some other embodiments of the present disclosure.

[0050] FIG. 7 A schematic view of a touch display panel provided in some other embodiments of the present disclosure. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0052] The terms used herein to describe embodiments of the present disclosure are not intended to limit and / or to define the scope of the present disclosure. For example, unless otherwise defined, technical terms or scientific terms used in the present disclosure should be interpreted as is normally understood by one of ordinary skill in the art to which the present disclosure pertains. It will be understood that the terms "first", "second", and similar terms used in the present disclosure do not necessarily imply any order, number, or importance, but are used to distinguish different constituent parts. Unless the context clearly indicates otherwise, the singular forms "a", "an", or "the" and the like are not limited to refer to the quantity of only one particular but also to include the possibility of plural unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are meant to be interpreted broadly to encompass the elements listed after such terms as well as equivalents thereof, and are not limited to the elements listed after such terms. The terms "connected", "coupled", and the like, unless otherwise defined, are not limited to direct or physical connections or couplings, but can include indirect connections or couplings, whether or not they are physical or mechanical. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and can change when the absolute positions of the described objects are changed.

[0053] In the following description, when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on the other element or layer, directly connected to the other element or layer, or an intervening element or layer can be present. When an element or layer is referred to as being "directly on" or "directly connected to" another element or layer, there is no intervening element or layer present. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0054] An organic light-emitting diode (OLED) panel has been widely concerned due to its self-luminescence, low power consumption, thinness, bendability, bright colors, high contrast, fast response rate, and other advantages. In some products, a color filter on encapsulation (COE) and a black matrix are formed on an encapsulation layer of an organic light-emitting diode, so that an anti-reflection effect can be achieved without a polarizer. In addition, in some products, a touch structure layer is arranged on the encapsulation layer to achieve touch, so that a multi-functional layer stacked film layer structure can be formed. Generally, in the process of manufacturing a display panel, the touch structure layer is first formed on the encapsulation layer, and then a planarization layer is formed; and then the color filter and the black matrix are formed on a side of the planarization layer away from the encapsulation layer. However, this will result in a complex process, and when the black matrix is far away from the organic light-emitting diode, the L-Decay attenuation of the organic light-emitting diode will be accelerated, and color deviation will easily occur.

[0055] FIG. 1A FIG. 1 shows a schematic diagram of a touch display panel provided in some embodiments of the present disclosure. As shown in FIG. 1, the touch display panel includes a display substrate 10, a black matrix 60, and a touch structure layer. FIG. 1A

[0056] The display substrate 10 can be an OLED display substrate. FIG. 1B FIG. 2 shows a schematic diagram of area division of a display substrate provided in some embodiments of the present disclosure. As shown in FIG. 2, the display substrate includes a plurality of pixel regions P and a plurality of spacing regions SP that separate the plurality of pixel regions P from each other. It should be noted that FIG. 1B FIG. 1B The number and arrangement of the pixel regions P in FIG. 2 are only exemplary.

[0057] In some embodiments, the display substrate 10 can specifically include a substrate 11 and a plurality of light emitting devices 23 disposed on the substrate 11, one light emitting device 23 being disposed in each pixel region P. The light emitting device 23 can be an OLED device, an LED device, or the like.

[0058] The black matrix 60 is located on the light-emitting side of the display substrate 10, i.e., the side of the plurality of light emitting devices 23 away from the substrate 11. The orthographic projection of the black matrix 60 on the display substrate 10 is located in the spacing region SP. The black matrix 60 can have a grid structure, and each grid hole of the black matrix 60 corresponds to a pixel region P of the display substrate 10.

[0059] In the embodiments of the present disclosure, the black matrix 60 can be made of black material or other materials as long as it can prevent the crosstalk of light emitted by different pixel regions P.

[0060] The touch structure layer is located on the light-emitting side of the display substrate 10 and is used to sense the touch position. The touch structure layer includes a first touch pattern layer 40, which includes a plurality of first metal wires 41. The orthographic projection of the first metal wires 41 on the display substrate 10 is located in the orthographic projection range of the black matrix 60 on the display substrate 10, and the first metal wires 41 are in contact with the black matrix 60. The first touch pattern layer 40 can be located on the side of the black matrix 60 close to the display substrate 10.

[0061] ​​In some embodiments, the first touch pattern layer 40 may include a plurality of self-capacitance electrodes, each of which includes a plurality of first metal lines 41. In other embodiments, the touch structure layer includes a first touch pattern layer 40 and a second touch pattern layer. The first touch pattern layer 40 includes a plurality of touch driving electrodes, and the second touch pattern layer includes a plurality of touch sensing electrodes. The touch driving electrodes and the touch sensing electrodes are interleaved and insulated from each other. The touch driving electrodes are metal mesh electrodes formed by a plurality of first metal lines 41, and the touch sensing electrodes are metal mesh electrodes formed by a plurality of second metal lines. Alternatively, the touch structure layer includes multiple touch driving electrodes and multiple touch sensing electrodes. Each touch driving electrode includes multiple driving electrode units and a connection portion located between adjacent driving electrode units. Each touch sensing electrode includes multiple sensing electrode units and a bridging portion located between adjacent sensing electrode units. The driving electrode units, connection portions, and sensing electrode units are all located in the first touch pattern layer 40 and are all metal mesh structures formed by multiple first metal lines. The multiple sensing electrode units are located in the second touch pattern layer and are all metal mesh structures formed by multiple second metal lines. Of course, the driving electrode units, connection portions, and sensing electrode units can also be disposed in the second touch pattern layer, and the multiple sensing electrode units can be disposed in the first touch pattern layer 40.

[0062] In this embodiment, the first metal line 41 in the first touch pattern layer 40 is in contact with the black matrix 60. That is, no other spacer layer is provided between the first metal line 41 of the first touch pattern layer 40 and the black matrix 60, thereby simplifying the structure of the touch display panel and the manufacturing process. Furthermore, the distance between the black matrix 60 and the light-emitting device 23 can be reduced, thereby improving the accelerated L-decay decay of the light-emitting device 23 and the color shift problem of the touch display panel.

[0063] like FIG. 1A As shown, the touch display panel may further include: a plurality of pixel filter units 80, the plurality of pixel filter units 80 including multiple colors, each pixel filter unit 80 being disposed opposite to a pixel region P of the display substrate 10, that is, the orthographic projection of each pixel filter unit 80 on the display substrate 10 at least partially overlaps with a pixel region. For example, the plurality of pixel regions P are divided into a plurality of pixel units, each pixel unit including a red pixel region, a green pixel region and a blue pixel region, and the plurality of pixel filter units 80 may include: a red pixel filter unit 80r corresponding to the red pixel region, a blue pixel filter unit 80b corresponding to the blue pixel region and a green pixel filter unit 80g corresponding to the green pixel region.

[0064] In some embodiments, such as FIG. 1A As shown, the black matrix 60 adopts a black single-layer structure, for example, the material of the black matrix 60 includes black organic materials.

[0065] When the first touch pattern layer 40 includes a plurality of self-capacitance electrodes, each of which includes a plurality of first metal wires 41, the black matrix 60 in the black single-layer structure can be located on the side of the first touch pattern layer 40 away from the display substrate 10.

[0066] As shown in FIG. 1, the touch display panel further includes a cover layer 91, and a normal projection of the cover layer 91 on the display substrate 10 covers each pixel region. FIG. 1A The cover layer 91 can be a continuous whole-layer structure or a non-continuous structure. For example, the cover layer 91 includes a plurality of cover portions, and a normal projection of each cover portion on the display substrate 10 covers at least one pixel region. The material of the cover layer 91 can include an inorganic insulating material or an organic insulating material.

[0067] FIG. 2A FIG. 1 is a schematic diagram of a touch display panel provided in some embodiments of the present disclosure, FIG. 2B FIG. 1 is a schematic diagram of a touch display panel provided in some embodiments of the present disclosure, FIG. 2A and FIG. 2B As shown in FIG. 1, in some embodiments, the black matrix 60 can include a first light filtering pattern 61 and a second light filtering pattern 62. The first light filtering pattern 61 is located on the side of the first touch pattern layer 40 away from the display substrate 10, and the second light filtering pattern 62 is located on the side of the first light filtering pattern 61 away from the display substrate 10. The normal projection of the first light filtering pattern 61 and the normal projection of the second light filtering pattern 62 on the display substrate 10 both cover the normal projection of the first touch pattern layer 40 on the display substrate 10. The first light filtering pattern 61 includes a plurality of first light filtering portions 61a, and the second light filtering pattern 62 includes a plurality of second light filtering portions 62a. The first light filtering portions 61a and the second light filtering portions 62a are arranged in a one-to-one correspondence. FIG. 2B As shown in FIG. 1, the first light filtering portions 61a and the second light filtering portions 62a are both in a strip structure. The plurality of first light filtering portions 61a are arranged in a staggered manner to form a grid structure, and the plurality of second light filtering portions 62a are arranged in a staggered manner to form a grid structure. Of course, the first light filtering portions 61a and the second light filtering portions 62a can also be in other shapes.

[0068] The materials of each first light filtering portion 61a and the corresponding second light filtering portion 62a are the same as the materials of the pixel light filtering portions 80 of the two colors.

[0069] That is, for any one first filter part 61a and its corresponding second filter part 62a, the first filter part 61a is the same as the material of one kind of pixel filter part, and the second filter part 62a is the same as the color of another kind of pixel filter part 80. Alternatively, the first filter pattern 61 can include a plurality of first filter parts 61a, and the second filter pattern 62 can include a plurality of second filter parts 62a, the colors of the plurality of first filter parts 61a are the same or not completely the same; the colors of the plurality of second filter parts 62a are the same or not completely the same. For example, for one of the first filter part 61a and its corresponding second filter part 62a, the materials of the two are respectively the same as the materials of the red pixel filter part 80r and the green pixel filter part 80g; for another of the first filter part 61a and its corresponding second filter part 62a, the materials of the two are respectively the same as the materials of the red pixel filter part 80r and the blue pixel filter part 80b.

[0070] In this case, the first filter part 61a and the second filter part 62a are respectively used to transmit light of different colors, so that the superposition of the first filter pattern 61 and the second filter pattern 62 can also play a role of light shielding, and in the preparation process of the touch display panel, the first filter part 61a can be manufactured synchronously with the pixel filter part 80 of the same material, and the second filter part 62a can be manufactured synchronously with the pixel filter part 80 of the same material, so that the first filter part 61a and the second filter part 62a do not need to be manufactured separately, thereby simplifying the manufacturing process.

[0071] As shown in FIG. 1, FIG. 2A As shown in FIG. 1,

[0072] In this case, the material of the light shielding part 63 can contain a metal element (for example, Cr element) so that the black matrix 60 can simultaneously achieve a high OD (optical density) value and a high impedance, but in this case, the light shielding part 63 also has a certain weak conductivity. However, FIG. 2A In the embodiment shown in FIG. 1, the first filter pattern 61 separates the first metal line 41 from the light shielding part 63, so that FIG. 2A The structure of FIG. 1 can prevent the weak conductivity of the light shielding part 63 from affecting the touch detection effect while simplifying the manufacturing process.

[0073] As shown in FIG. 1, FIG. 2AAs shown, at least a portion of the second filter pattern 62 may be located outside the via, and a portion of the orthogonal projection of the second filter pattern 62 on the display substrate 10 exceeds the orthogonal projection of the via on the display substrate 10, thereby ensuring the overall light-shielding effect of the black matrix 60.

[0074] In some embodiments, the materials and colors of the plurality of first filter portions 61a may be the same, and they may be connected as one unit; the materials and colors of the plurality of second filter portions 62a may be the same, and they may be connected as one unit.

[0075] FIG. 2C This is a schematic diagram of a touch display panel provided in some other embodiments of this disclosure. FIG. 2C The touch display panel shown FIG. 2A The touch display panel shown is the same, the only difference is that... FIG. 2C In the process, at least two first filter sections 61a have different colors, and at least two second filter sections 62a have different colors. FIG. 2C In the diagram, the first filter section 61a of different colors is represented by different cross-sectional lines, and the second filter section 62a of different colors is represented by different cross-sectional lines.

[0076] exist FIG. 1A , FIG. 2A and FIG. 2C In the touch display panel shown, the structure of the display substrate 10 can be the same, specifically, as... FIG. 1A , FIG. 2A and FIG. 2C As shown, the display substrate 10 includes a substrate 11 and a plurality of light-emitting devices 23 disposed on the substrate 11. Each pixel region has one light-emitting device 23. Additionally, the display substrate 10 includes a plurality of pixel driving circuits disposed between the substrate 11 and the plurality of light-emitting devices 23. Each pixel driving circuit corresponds to one of the light-emitting devices 23 and provides driving current to the light-emitting devices 23 to drive them to emit light. For example, the pixel driving circuit includes a plurality of thin-film transistors 21 and at least one capacitor Cs.

[0077] like FIG. 1A , FIG. 2A and FIG. 2CAs shown, the thin film transistor 21 includes a gate electrode 211, an active layer 212, a source electrode 213, and a drain electrode 214. Taking the thin film transistor 21 as an example of a top-gate thin film transistor, the active layer 212 is located between the gate electrode 211 and the substrate 11. The material of the active layer 212 can include, for example, an inorganic semiconductor material (e.g., polysilicon, amorphous silicon, etc.), an organic semiconductor material, or an oxide semiconductor material. The active layer 212 includes a channel portion and source and drain connecting portions located on both sides of the channel portion. The source connecting portion is connected to the source electrode 213 of the thin film transistor 21, and the drain connecting portion is connected to the drain electrode 214 of the thin film transistor 21. Both the source and drain connecting portions can be doped with impurities (e.g., N-type impurities or P-type impurities) having a higher impurity concentration than the channel portion. The channel portion is directly opposite the gate electrode 211 of the thin film transistor 21. When the voltage signal applied to the gate electrode 211 reaches a certain value, a carrier channel is formed in the channel portion, allowing the source electrode 213 and the drain electrode 214 of the thin film transistor 21 to be conductive.

[0078] A buffer layer BFL is provided between the thin film transistor 21 and the substrate 11 to prevent or reduce the diffusion of metal atoms and / or impurities from the substrate 11 into the active layer 212 of the thin film transistor 21. The buffer layer BFL can include an inorganic material such as silicon oxide, silicon nitride, and / or silicon oxynitride, and can be formed as a single layer or multiple layers.

[0079] A first gate insulating layer GI1 is provided on the side of the active layer 212 away from the substrate 11. The material of the first gate insulating layer GI1 can include a silicon compound or a metal oxide. For example, the material of the first gate insulating layer GI1 can include silicon oxynitride, silicon oxide, silicon nitride, silicon oxycarbide, silicon carbonitride, aluminum oxide, aluminum nitride, tantalum oxide, hafnium oxide, zirconium oxide, titanium oxide, etc. In addition, the first gate insulating layer GI1 can be a single layer or multiple layers.

[0080] The gate electrode 211 of the thin film transistor 21 and the first electrode plate Cs1 of the capacitor Cs are provided on the same layer and on the side of the first gate insulating layer GI1 away from the substrate 11. The material of the gate electrode 211 and the first electrode plate Cs1 can include, for example, a metal, a metal alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc.

[0081] A second gate insulating layer GI2 is provided on the side of the gate electrode 211 away from the substrate 11. The material of the second gate insulating layer GI2 can include, for example, silicon oxynitride, silicon oxide, silicon nitride, silicon oxycarbide, silicon carbonitride, etc.

[0082] The second electrode plate Cs2 of the capacitor Cs is provided on the side of the second gate insulating layer GI2 away from the substrate 11. The material of the second electrode plate Cs2 can be the same as that of the first electrode plate Cs1, and specific examples of the conductive material are listed above.

[0083] An interlayer insulating layer ILD is disposed on the side of the second electrode plate Cs2 of the capacitor Cs away from the substrate 11, and the material of the interlayer insulating layer ILD can include, for example, a silicon compound, a metal oxide, etc. The silicon compound and the metal oxide listed above can be selected specifically, and will not be described here again.

[0084] A first source-drain conductive layer is disposed on the side of the interlayer insulating layer ILD away from the substrate 11. The first source-drain conductive layer can include the source 213 and the drain 214 of each transistor, the source 213 being electrically connected to the source connection portion, and the drain 214 being electrically connected to the drain connection portion. The first source-drain conductive layer can include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc., for example, the first source-drain conductive layer can be a single layer or multiple layers of metal, for example, Mo / Al / Mo or Ti / Al / Ti.

[0085] A passivation layer PVX is disposed on the side of the source-drain conductive layer away from the substrate 11, and the material of the passivation layer PVX can include, for example, silicon oxynitride, silicon oxide, silicon nitride, etc.

[0086] A second source-drain conductive layer is disposed on the side of the passivation layer PVX away from the substrate 11, and can include a conductive structure such as a transfer electrode 22. The second source-drain conductive layer can include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc.

[0087] A planarization layer PLN is disposed on the side of the passivation layer PVX away from the substrate 11, and the planarization layer PLN can be made of an organic insulating material, for example, the organic insulating material includes a resin material such as polyimide, epoxy resin, acrylic, polyester, photoresist, polyacrylate, polyamide, siloxane, etc.

[0088] A pixel definition layer PDL is located on the side of the planarization layer PLN away from the substrate 11, and the pixel definition layer PDL has a plurality of pixel openings for accommodating light emitting devices. The light emitting device 23 includes a first electrode 231, a second electrode 232, and a light emitting functional layer 233 between the first electrode 231 and the second electrode 232. For example, the first electrode 231 is an anode, and the second electrode 232 is a cathode. Alternatively, the first electrode 231 is a reflective electrode made of a metal material, and the second electrode 232 is a transparent electrode made of a transparent conductive material (for example, indium tin oxide). The light emitting functional layer 233 can include, in sequence, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer. The first electrode 231 is located between the pixel definition layer PDL and the planarization layer PLN, and is connected to the transfer electrode 22 through a via on the planarization layer PLN, and then connected to the drain 214 of the thin film transistor 21 through the transfer electrode 22. Part of the first electrode 231 is exposed by the pixel opening. The second electrodes 232 of a plurality of light emitting devices 23 can be formed as an integral structure.

[0089] Optionally, the light-emitting device 23 is an OLED device, in which case the light-emitting layer uses an organic light-emitting material; or, the light-emitting device 23 is a QLED (Quantum Dot Light Emitting Diode) device, in which case the light-emitting layer uses a quantum dot light-emitting material. The color of the light emitted by each light-emitting device 23 is the same as the color of the corresponding pixel filter.

[0090] like FIG. 1A , FIG. 2A and FIG. 2C As shown, the display substrate 10 may further include an encapsulation layer 30, which covers the pixel boundary layer (PDL) and multiple light-emitting devices 23, for encapsulating the light-emitting devices 23 to prevent moisture and / or oxygen from corroding them. In some embodiments, the encapsulation layer 30 includes multiple encapsulation sub-layers stacked together. For example, the multiple encapsulation sub-layers include: a first inorganic encapsulation sub-layer 31, a second inorganic encapsulation sub-layer 32, and an organic encapsulation sub-layer 33. The second inorganic encapsulation sub-layer 32 is located on the side of the first inorganic encapsulation sub-layer 31 away from the substrate 11, and the organic encapsulation sub-layer 33 is located between the first inorganic encapsulation sub-layer 31 and the second inorganic encapsulation sub-layer 32. Both the first inorganic encapsulation sub-layer 31 and the second inorganic encapsulation sub-layer 32 can be made of highly dense inorganic materials such as silicon oxynitride, silicon oxide, or silicon nitride. The organic encapsulation sub-layer 33 can be made of a polymer material containing a desiccant or a polymer material that can block moisture. For example, a polymer resin can be used to relieve stress on the first inorganic encapsulation sublayer 31 and the second inorganic encapsulation sublayer 32. It may also include water-absorbing materials such as desiccants to absorb water molecules and / or oxygen molecules that have penetrated into the interior.

[0091] In some embodiments, the display substrate 10 may further include a spacer layer (not shown) located between the pixel defining layer PDL and the encapsulation layer 30. The spacer layer may further increase the path for external moisture or oxygen to enter the display area, thereby protecting the light-emitting device 23 in the display area.

[0092] In Figure 1 and FIG. 2A , FIG. 2C In the touch display panel shown, the second inorganic encapsulation sub-layer 32 can be a continuous solid film layer, and a buffer layer can be provided between the first touch pattern layer 40 and the encapsulation layer 30. Of course, the first touch pattern layer 40 and the pixel filter 80 can be directly disposed on the encapsulation layer 30 and in contact with the second inorganic encapsulation sub-layer 32, thereby reducing the overall thickness of the touch display panel; and reducing the distance between the black matrix 60 and the light-emitting device 23, improving the problem of excessively fast L-decay decay and color shift of the light-emitting device.

[0093] FIG. 3 This is a schematic diagram of a touch display panel provided in some other embodiments of this disclosure. FIG. 3 The touch display panel shown is FIG. 2A The touch display panels shown are similar, the difference being that... FIG. 3 In addition to the first touch pattern layer 40, the touch structure layer in the touch display panel shown may also include a second touch pattern layer 50. The second touch pattern layer is located on the side of the first touch pattern layer 40 closest to the display substrate 10, and includes multiple second metal lines 51. The orthographic projection of each second metal line 51 on the display substrate 10 is within the orthographic projection range of the black matrix 60 on the display substrate 10.

[0094] like FIG. 3 As shown, a first insulating layer 90 may also be provided between the second touch pattern layer 50 and the first touch pattern layer 40. As described above, the first touch pattern layer 40 may include multiple touch driving electrodes, and the second touch pattern layer 50 may include multiple touch sensing electrodes. In this case, the first insulating layer 90 insulatingly separates the first touch pattern layer 40 and the second touch pattern layer 50; or, one of the first touch pattern layer 40 and the second touch pattern layer 50 includes: a driving electrode unit and a connecting portion of the touch driving electrode and a sensing electrode unit of the touch sensing electrode; the other of the first touch pattern layer 40 and the second touch pattern layer 50 includes: a bridging portion of the touch sensing electrode. In this case, the bridging portion is connected to the sensing electrode through a via on the first insulating layer 90.

[0095] FIG. 4 This is a schematic diagram of a touch display panel provided in some other embodiments of this disclosure. FIG. 4 The touch display panel shown is FIG. 3 The touch display panels shown are similar, each including: a display substrate 10, and a touch structure layer, a black matrix 60, multiple pixel filter sections 80, and a cover layer 91 located on the light-emitting side of the display substrate 10. The touch structure layer includes a first touch pattern layer 40 and a second touch pattern layer 50. The first touch pattern layer 40 includes multiple first metal lines 41, and the second touch pattern layer 50 includes multiple second metal lines 51. The orthographic projections of the first metal lines 41 and the second metal lines 51 onto the display substrate 10 are both within the orthographic projection range of the black matrix 60 onto the display substrate 10. The following section discusses... FIG. 4 and FIG. 3 The differences between them will be explained.

[0096] like FIG. 4As shown, the second touch pattern layer 50 is located on the side of the first touch pattern layer 40 away from the display substrate 10, and the black matrix 60 is located between the first touch pattern layer 40 and the second touch pattern layer 50. In this way, the black matrix 60 can be used to separate the first touch pattern layer 40 and the second touch pattern layer 50, and there is no need to additionally manufacture an insulating layer between the first touch pattern layer 40 and the second touch pattern layer 50.

[0097] When the second touch pattern layer 50 is located on the side of the black matrix 60 away from the display substrate 10, the refractive index of the second metal wire 51 away from the surface of the display substrate 10 can be set to be less than or equal to 5% to prevent the reflection of the second metal wire 51 on the external environment light from affecting the display effect. In some examples, the second metal wire 51 can include a stack of multiple metal layers, wherein the metal layer farthest away from the display substrate 10 adopts a black metal layer, and at least one of the remaining metal layers adopts a metal layer with a higher electrical conductivity, for example, the second metal wire 51 adopts a stack of MoOx / Al / Ti or a stack of MoOx / Al / MoOx, and the surface reflectivity thereof is about 4.2%.

[0098] In addition, as shown in FIG. 4 The black matrix 60 has a first surface s1 facing away from the display substrate 10, a second surface facing the display substrate 10, and a side surface connecting the first surface s1 and the second surface s2. Moreover, the first surface s1 of the black matrix 60 is higher than the surface of the pixel filter 80 away from the display substrate 10, so that a part of the side surface of the black matrix 60 is in contact with the cover layer 91, as shown in FIG. 4 The side surface of the black matrix 60 includes a first sub-side surface s3 in contact with the cover layer 91. Moreover, the refractive index of the part of the black matrix 60 close to the first sub-side surface s3 is less than the refractive index of the cover layer 91, so that at least a part of the light emitted by the display substrate 10 is totally reflected at the first sub-side surface s3, and is reflected by the first sub-side surface s3 in a direction away from the display substrate 10, thereby improving the brightness of the touch display panel.

[0099] The first sub-side surface s3 can be an inclined plane, or an arc surface concave or convex outward, as long as at least a part of the light emitted by the display substrate 10 is totally reflected at the first sub-side surface s3.

[0100] In one example, the refractive index of the part of the black matrix 60 close to the first sub-side surface s3 can be 1.5-1.6, and the refractive index of the cover layer 91 can be 1.7-1.8.

[0101] It should be noted that, in FIG. 4The black matrix 60 in the touch display panel shown can adopt a single-layer structure of black color, for example, a black organic insulating material can be adopted. Of course, the black matrix 60 can also adopt the structure of the black matrix 60 in FIG. 2 (i.e., including the light shielding part 63, the first light filtering pattern 61 and the second light filtering pattern 62), in which case, the first metal lines 41 are located on the side of the first light filtering pattern 61 close to the display substrate 10, and the second metal lines 51 are located on the side of the second light filtering pattern 62 away from the display substrate 10. Moreover, the refractive index of the light shielding part 63 can be set to be greater than the refractive index of the cover layer 91, so that the surface of the light shielding part 63 in contact with the cover layer 91 forms a total reflection surface.

[0102] In FIG. 3 , the cover layer 91 can be the same as the cover layer 91 in FIG. 5 , and both adopt a whole-layer film layer.

[0103] FIG. 5 A schematic diagram of a touch display panel provided in another embodiment of the present disclosure is shown in FIG. 4 , which is similar to the touch display panel shown in FIG. 5 , and the difference is that, in FIG. 6 , the cover layer 91 is no longer a continuous film layer, but includes a plurality of cover parts 91a arranged at intervals, and the orthographic projection of each cover part 91a on the display substrate 10 covers at least one pixel region.

[0104] The plurality of cover parts 91a can be formed by a photolithography patterning process.

[0105] FIG. 6 A schematic diagram of a touch display panel provided in another embodiment of the present disclosure is shown in FIG. 4 , which is similar to the touch display panel shown in FIG. 6 , and both include a display substrate 10, and a touch structure layer, a black matrix 60, a plurality of pixel light filtering parts 80 and a cover layer 91 located on the light-emitting side of the display substrate 10. The touch structure layer includes a first touch pattern layer 40 and a second touch pattern layer 50, the first touch pattern layer 40 includes a plurality of first metal lines 41, the second touch pattern layer 50 includes a plurality of second metal lines 51, and the orthographic projection of the first metal lines 41 and the second metal lines 51 on the display substrate 10 are both located within the orthographic projection range of the black matrix 60 on the display substrate 10. The side of the black matrix 60 away from the display substrate 10 is provided with the cover layer 91, and the orthographic projection of the cover layer 91 on the display substrate 10 covers each pixel region. The following describes the difference between FIG. 5 and FIG. 6 .

[0106] In FIG. 6In the touch display panel shown in FIG. 1, the second touch pattern layer 50 is located on the side of the first touch pattern layer 40 close to the display substrate 10, and the second insulating layer 93 is arranged between the second touch pattern layer 50 and the first touch pattern layer 40, and the orthographic projection of the second insulating layer 93 on the display substrate 10 is located in the interval region.

[0107] The second insulating layer 93 has a first surface s4 facing away from the display substrate 10, a second surface s5 facing towards the display substrate 10, and a side surface connecting the first surface s4 and the second surface s5. The side surface of the second insulating layer 93 includes a first sub-side surface s6 in contact with the cover layer 91. The refractive index of the second insulating layer 93 is less than the refractive index of the cover layer 91, so that at least part of the light rays emitted by the display substrate 10 to the first sub-side surface s6 of the second insulating layer 93 are totally reflected at the first sub-side surface s6, and are reflected by the first sub-side surface s6 in a direction away from the display substrate 10.

[0108] In FIG. 6 In the touch display panel shown in FIG. 1, the first metal line 41 and the second metal line 51 are both located on the side of the black matrix 60 close to the display substrate 10, and thus will not receive ambient light. Therefore, there is no special requirement for the reflectivity of the first metal line 41 and the second metal line 51, and the materials of the two can or can not include black metal.

[0109] In FIG. 4 to FIG. 6 In the touch display panel shown in FIG. 1, the cover layer 91 can be arranged as a continuous whole layer film, or can include a plurality of spaced apart cover portions.

[0110] In FIG. 2A In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and FIG. 4 to FIG. 6 In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and FIG. 7 In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and

[0111] FIG. 7 In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and FIG. 4 In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and FIG. 7 In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and FIG. 7 In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and

[0112] In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 and

[0113] In the touch display panel shown in FIG. 1, the structure of the display substrate 10 is the same as that of the display substrate 10 in FIG. 1 andFIG. 7 In the touch display panel shown, the distance between the pixel filter 80 and the light-emitting device 23 is further reduced. Furthermore, both the pixel filter 80 and the organic encapsulation sublayer 32 are made of organic materials, and their refractive indices are relatively close. This reduces the possibility of total internal reflection of light from the light-emitting device 23 at the interface between the pixel filter 80 and the organic encapsulation sublayer 32, thereby improving light extraction efficiency. In one example, the refractive indices of both the pixel filter 80 and the organic encapsulation sublayer 32 are between 1.5 and 1.65.

[0114] exist FIG. 4 to FIG. 7 In the touch display panel shown, the cover layer 91 can be a continuous solid film layer or it can include multiple spaced cover portions.

[0115] exist FIG. 2A Each touch display panel shown may further include an adhesive layer 92 and a cover plate. The adhesive layer 92 is located on the side of the cover layer 91 away from the display substrate 10, and the cover plate is located on the side of the adhesive layer 92 away from the display substrate 10 and is bonded to the adhesive layer 92. The adhesive layer 92 may be made of optical adhesive, and the cover plate may be made of a glass substrate or a flexible substrate made of a flexible material. Of course, in Figure 1, FIG. 2C and FIG. 4 to FIG. 7 The touch display panel shown may also include the aforementioned adhesive layer and cover plate.

[0116] It should be noted that the structures of the touch display panels in the above embodiments are merely exemplary implementations used to illustrate the principles of this disclosure. Those skilled in the art can make various modifications and improvements without departing from the spirit and substance of this disclosure. For example, for ​ The touch display panel shown can omit the second touch graphic layer and set the first touch graphic layer as multiple self-capacitance electrodes.

[0117] This disclosure also provides a touch display device, which includes the touch display panel described in the above embodiments. The touch display device can be any product or component with display functionality, such as an OLED panel, a QLED display panel, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, or a navigator.

[0118] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A touch display panel, comprising: The display substrate includes a plurality of pixel areas and a spacing area that separates the plurality of pixel areas from each other; A black matrix is ​​located on the light-emitting side of the display substrate, and the orthographic projection of the black matrix on the display substrate is located in the interval area; The touch structure layer includes a first touch pattern layer located on the light-emitting side of the display substrate; the first touch pattern layer includes a plurality of first metal lines, the orthographic projection of the first metal lines on the display substrate is located within the orthographic projection range of the black matrix on the display substrate, and the first metal lines are in contact with the black matrix; The touch display panel further includes: a plurality of pixel filter units, each of the pixel filter units being disposed opposite to one of the pixel areas of the display substrate; The display substrate includes: Substrate; Multiple light-emitting devices are disposed on the substrate, and each pixel region is provided with one light-emitting device; An encapsulation layer is disposed on the side of the light-emitting device away from the substrate; the encapsulation layer includes: a first inorganic encapsulation sublayer, an organic encapsulation sublayer, and a second inorganic encapsulation sublayer disposed sequentially along the direction away from the substrate; The plurality of pixel filter portions are in contact with the encapsulation layer, the second inorganic encapsulation sublayer has a plurality of cutout portions, each cutout portion corresponds to a pixel region, and at least a portion of the filter portion is in contact with the organic encapsulation sublayer through the cutout portions; The refractive index of the pixel filter and the refractive index of the organic encapsulation sublayer are both between 1.5 and 1.

65.

2. The touch display panel according to claim 1, wherein, The black matrix adopts a black single-layer structure.

3. The touch display panel according to claim 1, wherein, The touch display panel further includes: a plurality of pixel filter sections, the plurality of pixel filter sections having multiple colors, and each pixel filter section being disposed opposite to a pixel area of ​​the display substrate; The black matrix includes: a first filter pattern and a second filter pattern. The first filter pattern is located on the side of the first touch pattern layer away from the display substrate, and the second filter pattern is located on the side of the first filter pattern away from the display substrate. The orthographic projections of the first filter pattern and the second filter pattern on the display substrate both cover the orthographic projection of the first touch pattern layer on the display substrate. The first filter pattern includes a plurality of first filter portions, and the second filter pattern includes a plurality of second filter portions. The first filter portions and the second filter portions are arranged opposite each other in a one-to-one correspondence. The materials of each of the first filter portions and its corresponding second filter portions are the same as the materials of the pixel filter portions of the two colors, respectively.

4. The touch display panel according to claim 3, wherein, The black matrix further includes a light-shielding part, which is a black single-layer structure with a through hole. At least a portion of the first metal line and the first light-filtering pattern are located in the through hole, and the first metal line and the light-shielding part are separated by the first light-filtering pattern.

5. The touch display panel according to claim 4, wherein, At least a portion of the second filter pattern is located outside the via, and a portion of the orthogonal projection of the second filter pattern on the display substrate extends beyond the orthogonal projection of the via on the display substrate.

6. The touch display panel according to claim 3, wherein, The first filter pattern has multiple first filter portions of the same color; or, at least two first filter portions have different colors. The colors of the multiple second filter portions of the second filter pattern are the same; or, at least two of the second filter portions are different colors.

7. The touch display panel according to any one of claims 1 to 6, wherein, The first touch graphic layer is located on the side of the black matrix closer to the display substrate; The touch structure layer also includes: The second touch graphic layer is located on the side of the black matrix away from the display substrate, and includes multiple second metal lines, the orthographic projection of the multiple second metal lines on the display substrate being within the orthographic projection range of the black matrix on the display substrate.

8. The touch display panel according to claim 7, wherein, The refractive index of the second metal line on the surface away from the display substrate is less than 5%.

9. The touch display panel according to any one of claims 1 to 8, wherein, The touch display panel further includes a cover layer, the cover layer's orthographic projection on the display substrate covering each pixel area. The black matrix has: a first surface facing away from the display substrate, a second surface facing the display substrate, and a side surface connected between the first surface and the second surface. The side surface of the black matrix includes a first sub-side surface that contacts the cover layer. The refractive index of the portion of the black matrix near the first sub-side surface is less than the refractive index of the cover layer, so that at least a portion of the light irradiated by the display substrate onto the first sub-side surface is reflected by the first sub-side surface in a direction away from the display panel.

10. The touch display panel according to claim 9, wherein, The covering layer is a continuous film layer; Alternatively, the cover layer includes a plurality of cover portions spaced apart, each of the cover portions covering at least one pixel area in its orthogonal projection onto the display substrate.

11. The touch display panel according to any one of claims 1 to 6, wherein, The first touch graphics layer is located on the side of the black matrix closer to the display panel, and the touch display panel further includes: The second touch pattern layer is located on the side of the first touch pattern layer close to the display substrate, and includes multiple second metal lines, the orthographic projection of the multiple second metal lines on the display substrate being within the orthographic projection range of the black matrix on the display substrate; An insulating layer is located between the first touch pattern layer and the second touch pattern layer, and the orthographic projection of the insulating layer on the display substrate is located in the interval area.

12. The touch display panel according to claim 11, wherein, The touch display panel further includes a cover layer, the cover layer's orthographic projection on the display substrate covering each pixel area. The insulating layer has: a first surface facing away from the display substrate, a second surface facing the display substrate, and a side surface connected between the first surface and the second surface. The side surface of the insulating layer includes a first sub-side surface that contacts the cover layer. The refractive index of the insulating layer is less than that of the second cover layer, so that at least a portion of the light irradiated by the display substrate onto the first sub-side surface is reflected by the first sub-side surface in a direction away from the display substrate.

13. The touch display panel according to claim 12, wherein, The covering layer is a continuous film layer; Alternatively, the cover layer includes a plurality of cover portions spaced apart, each of the cover portions covering at least one pixel area in its orthogonal projection onto the display substrate.

14. A touch display device comprising a touch display panel according to any one of claims 1 to 13.

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