Touch display panel and touch display device

Abstract

The invention discloses a touch display panel and a touch display device. The touch display panel comprises a substrate; the plurality of light emitting devices are arranged on the substrate, and the light emitting colors of the plurality of light emitting devices are various; the packaging structure is positioned on one side, far away from the substrate, of the plurality of light-emitting devices; the touch electrode layer is located on the side, away from the substrate, of the packaging structure; the gray filter layer is located between the packaging structure and the touch electrode layer so as to be reused as a touch buffer layer; and the orthographic projection of the gray filter layer on the substrate is overlapped with the orthographic projections of the plurality of light-emitting devices on the substrate.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a touch display panel and a touch display device. Background Art

[0002] At present, organic light emitting diode (OLED) touch products are divided into external type and integrated type (FMLOC, Flexible Multi-Layer On Cell). The touch layer of external touch products is far away from the electrode layer of the display device, the parasitic capacitance between layers is small, and the display noise has little effect on the touch signal transmission. It can be applied to small and medium-sized notebooks, mobile phones, and watches. For large-sized touch products, there is a high noise problem, which increases the power consumption of the display panel. Integrating color film into OLED display products can reduce the power consumption of the product, reduce the thickness of the product, and meet the bending requirements. Summary of the invention

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

[0004] In a first aspect, the present disclosure provides a touch display panel, comprising:

[0005] substrate;

[0006] A plurality of light-emitting devices are disposed on the substrate, wherein the light-emitting colors of the plurality of light-emitting devices include multiple colors;

[0007] A packaging structure, located on a side of the plurality of light-emitting devices away from the substrate;

[0008] A touch electrode layer, located on a side of the packaging structure away from the substrate;

[0009] A gray filter layer is located between the packaging structure and the touch electrode layer to be reused as a touch buffer layer; the orthographic projection of the gray filter layer on the substrate overlaps with the orthographic projection of the plurality of light emitting devices on the substrate.

[0010] In some embodiments, the transmission spectrum curve of the gray filter layer has a plurality of peaks, and the plurality of peaks correspond one-to-one to the light of a plurality of colors emitted by the plurality of light emitting devices.

[0011] In some embodiments, a surface of the packaging structure away from the substrate has a recess corresponding to the light-emitting device, the recess is filled with the gray filter layer, and a surface of the gray filter layer away from the substrate is a flat surface.

[0012] In some embodiments, the encapsulation structure includes: a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are arranged in sequence along a direction away from the substrate, and the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are all bent toward the substrate at a position corresponding to the light-emitting device.

[0013] In some embodiments, a maximum thickness of the gray filter layer is less than a maximum thickness of the organic encapsulation layer.

[0014] In some embodiments, the surface of the packaging structure away from the substrate is a flat surface, and the gray filter layer is attached to the flat surface.

[0015] In some embodiments, the encapsulation structure includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially arranged in a direction away from the substrate, and the thickness of the gray filter layer is less than or equal to 2 / 3 of the maximum thickness of the organic encapsulation layer.

[0016] In some embodiments, the encapsulation structure includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially arranged in a direction away from the substrate, and a material of the organic encapsulation layer is the same as a material of the gray filter layer.

[0017] In some embodiments, the touch electrode layer includes: a first touch graphic layer, a touch insulating layer, and a second touch graphic layer, which are arranged in sequence in a direction away from the substrate, and the touch insulating layer is made of the same material as the gray filter layer.

[0018] In some embodiments, the transmittance of the gray filter layer to light of various colors emitted by the plurality of light emitting devices is greater than 42%.

[0019] In some embodiments, the touch display panel further includes a light shielding layer, the light shielding layer is located on a side of the touch electrode layer away from the substrate, the light shielding layer has a plurality of light openings, and the orthographic projection of the light emitting device on the substrate overlaps with the orthographic projection of the light openings on the substrate;

[0020] The touch electrode layer includes: a first touch graphic layer, a touch insulating layer, and a second touch graphic layer, which are arranged in sequence along a direction away from the substrate, and the materials of the first touch graphic layer and the second touch graphic layer both include metal; the orthographic projections of the first touch graphic layer and the second touch graphic layer on the substrate are both located within the orthographic projection range of the light shielding layer on the substrate.

[0021] In some embodiments, the second touch graphic layer contacts the light shielding layer.

[0022] In some embodiments, the light shielding layer covers the second touch graphic layer.

[0023] In some embodiments, the touch electrode layer includes a plurality of first touch electrodes extending along a first direction, and a plurality of second touch electrodes extending along a second direction, the first touch electrodes include a plurality of first electrode units arranged along the first direction, and a bridge portion electrically connected between two adjacent first electrode units; the first electrode units are electrically connected to the bridge portion through a via hole penetrating the touch insulating layer;

[0024] The first electrode unit and the second touch electrode are both located in one of the first touch graphic layer and the second touch graphic layer, and the bridge portion is located in the other of the first touch graphic layer and the second touch graphic layer.

[0025] In some embodiments, the touch display panel further includes:

[0026] A touch flat layer, located between the touch electrode layer and the light shielding layer;

[0027] The covering layer is located on a side of the light shielding layer away from the substrate.

[0028] In a second aspect, the present disclosure provides a touch display device, which includes the above-mentioned touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1A This is a schematic diagram of a first touch display panel provided in some embodiments of the present disclosure.

[0030] Figure 1B This is a transmission spectrum curve of the gray filter layer provided in some embodiments of the present disclosure.

[0031] Figure 2 This is a plan view of a touch electrode layer provided in some embodiments of the present disclosure.

[0032] Figure 3 For along Figure 2 Sectional view along line A-A'.

[0033] Figure 4 A schematic diagram of a second touch display panel provided in some embodiments of the present disclosure.

[0034] Figure 5 This is a schematic diagram of a third touch display panel provided in some embodiments of the present disclosure.

[0035] Figure 6 This is a schematic diagram of a fourth touch display panel provided in some embodiments of the present disclosure.

[0036] Figure 7It is a schematic diagram of a fifth touch display panel provided in some embodiments of the present disclosure.

[0037] Figure 8 This is a schematic diagram of a sixth touch display panel provided in some embodiments of the present disclosure.

[0038] Fig. 9 It is a schematic diagram of a seventh touch display panel provided in some embodiments of the present disclosure.

[0039] Fig.10 This is a schematic diagram of an eighth touch display panel provided in some embodiments of the present disclosure.

[0040] Fig.11 It is a schematic diagram of a ninth touch display panel provided in some embodiments of the present disclosure.

[0041] Fig.12 It is a schematic diagram of a tenth touch display panel provided in some embodiments of the present disclosure.

[0042] Fig.13 It is a schematic diagram of an eleventh touch display panel provided in some embodiments of the present disclosure.

[0043] Fig.14 This is a schematic diagram of the connection between the driving circuit layer and the light-emitting device provided in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Unless otherwise defined, the technical terms or scientific terms involved in the present disclosure shall be the common meanings understood by people with ordinary skills in the technical field to which the present disclosure belongs. The words "one", "a", "a", "the" and the like involved in the present disclosure do not indicate a quantity limitation, and may indicate the singular or the plural. The terms "include", "comprise", "have" and any of their variations involved in the present disclosure are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in the present disclosure are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in the present disclosure refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" may indicate: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in the present disclosure are only used to distinguish similar objects and do not represent a specific ordering of the objects. "Up", "down", "left", "right", etc. are only used to indicate a relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0046] In order to realize the bending and curling characteristics of the OLED display panel, a thin film encapsulation (TFE) process is used in some touch display panels, and the touch process is integrated into the display substrate. Specifically, the touch display panel includes: a substrate, a plurality of light-emitting devices arranged on the substrate, a packaging structure for packaging the plurality of light-emitting devices, and a touch electrode layer located on the side of the packaging structure away from the substrate, and the plurality of light-emitting devices include, for example, a plurality of red light-emitting devices, green light-emitting devices, and blue light-emitting devices. In addition, a color filter portion may be provided on the light-emitting side of the light-emitting device, and the color of the color filter portion is the same as the light-emitting color of the corresponding light-emitting device. Since the color filter portion can filter a certain amount of light, the reflection of the display panel to the ambient light can be reduced. Therefore, when the color filter portion is provided in the display panel, a circular polarizer may no longer be provided. Compared with the circular polarizer, the color filter portion has a higher transmittance, thereby reducing the power consumption of the display panel.

[0047] However, in the manufacturing process of the display panel, each color filter requires a composition process. When the color filter includes three colors: red, green, and blue, three composition processes are required to produce multiple color filters, which leads to complex processes and high mask costs.

[0048] Figure 1A is a schematic diagram of a first touch display panel provided in some embodiments of the present disclosure, such as Figure 1A As shown, the touch display panel includes: a substrate SUB, and a plurality of light emitting devices 20 , a packaging structure 30 , a touch electrode layer 40 and a gray filter layer 50 arranged on the substrate SUB.

[0049] The light emitting colors of the plurality of light emitting devices 20 include multiple colors, for example, the light emitting colors of the plurality of light emitting devices 20 include red, green and blue. The encapsulation structure 30 is located on a side of the plurality of light emitting devices 20 away from the substrate SUB, and is used to encapsulate the plurality of light emitting devices 20. The touch electrode layer 40 is located on a side of the encapsulation structure 30 away from the substrate SUB, and is used to detect the touch position. The gray filter layer 50 is located on a side of the encapsulation structure 30 away from the substrate SUB.

[0050] In the embodiment of the present disclosure, the gray filter layer 50 has a certain transmittance for each color of light emitted by the light-emitting device 20, and the transmittance is less than 100%, so that it can also have a certain filtering effect on the external ambient light, thereby reducing the reflection of the touch display panel to the ambient light. In addition, the gray filter layer 50 corresponding to each light-emitting device 20 is the same, and at most one composition process is required to produce the gray filter layer 50, thereby simplifying the production process and reducing production costs.

[0051] It should be noted that the gray filter layer 50 can be a whole film layer and covers the display area of ​​the touch display panel but does not cover the peripheral area around the display area. In this case, a composition process is required to produce the gray filter layer 50; or, the gray filter layer 50 is a whole film layer covering the display area and the peripheral area. In this case, the gray filter layer 50 does not need to be patterned.

[0052] Figure 1B is a transmission spectrum curve of the gray filter layer provided in some embodiments of the present disclosure, such as Figure 1B As shown, the transmission spectrum curve of the gray filter layer has multiple peaks, and the multiple peaks correspond one-to-one to the multiple colors of light emitted by the multiple light-emitting devices. For example, the colors of the light emitted by the multiple light-emitting devices include red, green and blue. In the transmission spectrum curve of the gray filter layer, there are transmittance troughs in the wavelength range of 480nm to 530nm and in the wavelength range of 580nm to 630nm. Thus, three peaks of transmittance at wavelengths of 380nm to 480nm, 480nm to 580nm, and 600nm to 780nm can be obtained. The light corresponding to these three peaks is blue light, green light and red light, respectively, so that the gray filter layer can achieve the transmission of three colors of light.

[0053] In some embodiments, the transmittance of the gray filter layer 50 to the various colors of light emitted by the light emitting device 20 is greater than 42%, so that the attenuation of the light of the light emitting device 20 in the gray filter layer 50 can be reduced, and the power consumption of the touch display panel can be reduced. For example, the transmittance of the gray filter layer 50 to the various colors of light emitted by the light emitting device 20 is between 42% and 90%, or between 45% and 90%, or between 50% and 90%, or between 50% and 85%, or between 55% and 85%, so that the gray filter layer 50 can be guaranteed to have sufficient transmittance and reduce the reflection of the touch display panel to the ambient light. Compared with the method of using a circular polarizer to reduce the reflection of the ambient light, since the transmittance of the gray filter layer 50 to the light emitted by each light emitting device 20 is higher than the transmittance of the circular polarizer, when the gray filter layer 50 is set, the front light output efficiency of the touch display panel can be improved and the power consumption can be reduced.

[0054] Since the touch display panel of the embodiment of the present disclosure has low power consumption, it can be applied to various display devices of large, medium and small sizes.

[0055] In some embodiments, the gray filter layer 50 may be made of organic materials.

[0056] The touch display panel in the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0057] In some embodiments, the substrate SUB may be a rigid substrate, such as a glass substrate, or a flexible substrate SUB, which may be made of a flexible organic material, such as a resin material such as polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate.

[0058] like Figure 1A As shown, a driving circuit layer 10 is provided on the substrate SUB, and the driving circuit layer 10 includes a pixel circuit for providing a driving current for each light-emitting device 20. The pixel defining layer PDL and the plurality of light-emitting devices 20 are provided on a side of the driving circuit layer 10 away from the substrate SUB, and the pixel defining layer PDL has a plurality of pixel openings, and the plurality of pixel openings are located in the display area of ​​the touch display panel. For example, each pixel opening corresponds to a light-emitting device 20. The material of the pixel defining layer PDL may include organic insulating materials such as polyimide, polyphthalimide, polyphthalamide, acrylic resin, benzocyclobutene or phenolic resin.

[0059] The light-emitting device 20 may be an OLED device, which includes a first electrode 21, a light-emitting layer 23, and a second electrode 22 sequentially arranged in a direction away from the substrate SUB, for example, the first electrode 21 is an anode, and the second electrode 22 is a cathode. The second electrodes 22 of a plurality of light-emitting devices 20 are connected to form a second electrode layer of a whole layer. The first electrode 21 is located on a side of the pixel defining layer PDL close to the driving circuit layer 10, and at least a portion of the first electrode 21 is exposed by the pixel opening, and the light-emitting layer 23 is located in the pixel opening. It should be noted that the light-emitting device 20 may also include other film layers, for example, it may also include: a hole injection layer and a hole transport layer located between the first electrode 21 and the light-emitting layer 23, and an electron transport layer and an electron injection layer located between the light-emitting layer 23 and the second electrode 22.

[0060] In some embodiments, Figure 1A As shown, a spacer PS is further disposed on the side of the pixel defining layer PDL away from the substrate SUB. The spacer PS can be made of organic material, such as polyimide, polyphthalimide, polyphthalamide, acrylic resin, benzocyclobutene or phenolic resin, etc. The second electrode layer covers the spacer PS.

[0061] like Figure 1A As shown, the orthographic projection of the spacer PS on the substrate SUB is located within the orthographic projection range of the surface of the pixel defining layer PDL away from the substrate SUB on the substrate SUB to prevent the second electrode layer from breaking. In one example, along the direction close to the substrate SUB, the cross section of the spacer PS and the cross section of the pixel defining layer PDL gradually increase, wherein the cross section of the spacer PS and the cross section of the pixel defining layer PDL refer to the cross section of the spacer PS perpendicular to the thickness direction of the substrate SUB and the cross section of the pixel defining layer PDL perpendicular to the thickness direction of the substrate SUB, respectively. In one example, the slope angles of the side of the spacer PS and the side of the pixel defining layer PDL are substantially the same, for example, both are between 30° and 70°, thereby further preventing the second electrode layer from breaking. The slope angle of the spacer PS (or pixel defining layer PDL) refers to the angle between the side and bottom of the spacer PS (or pixel defining layer PDL).

[0062] In some embodiments, Figure 1AAs shown, the encapsulation structure 30 is arranged on the side of the plurality of light-emitting devices 20 away from the substrate SUB. For example, the encapsulation structure 30 includes: a first inorganic encapsulation layer 31, an organic encapsulation layer 33, and a second inorganic encapsulation layer 32, which are arranged in sequence in a direction away from the substrate SUB. The first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 32 can be made of inorganic materials with high density such as silicon oxynitride (SiON), silicon oxide (SiOx), and silicon nitride (SiNx). The organic encapsulation layer 33 can be made of a polymer material containing a desiccant, or a polymer material that can block water vapor. For example, a polymer resin is used to relieve the stress of the first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 32, and a water-absorbing material such as a desiccant can also be included to absorb water, oxygen, and other substances that invade the interior. In one example, the surface of the organic encapsulation layer 33 away from the substrate SUB and the surface of the second inorganic encapsulation layer 32 away from the substrate SUB are both substantially flat surfaces.

[0063] In some embodiments, the maximum thickness of the organic encapsulation layer 33 is less than or equal to 12 microns to ensure that the surface of the organic encapsulation layer 33 away from the substrate SUB can form a flat surface and prevent the emitted light of the light emitting device 20 from being greatly attenuated in the organic encapsulation layer 33 .

[0064] In some embodiments, Figure 1A As shown, the touch buffer layer TBL is arranged on the side of the package structure 30 away from the substrate SUB. For example, the touch buffer layer TBL can be made of inorganic materials or organic materials. The touch electrode layer 40 is arranged on the side of the touch buffer layer TBL away from the substrate SUB, and is used to detect the occurrence of touch. In some embodiments, the touch electrode layer 40 includes: a first touch graphic layer 41, a touch insulating layer TLD and a second touch graphic layer 42 arranged along one side away from the substrate SUB.

[0065] Figure 2 is a plan view of a touch electrode layer 40 provided in some embodiments of the present disclosure, Figure 3 for Figure 2 A cross-sectional view of the touch electrode layer along line AA' in FIG. Figure 2 and Figure 3 As shown, in some examples, the touch display panel has a display area DA and a peripheral area PA located around the display area DA, and the touch electrode layer 40 includes a plurality of first touch electrodes extending along a first direction and a plurality of second touch electrodes extending along a second direction, and the first direction intersects with the second direction, for example, they are perpendicular to each other. The first touch electrode and the second touch electrode are both located in the display area DA. In the embodiment of the present disclosure, the first touch electrode is a touch sensing electrode RX, and the second touch electrode is a touch driving electrode TX. In other examples, the first touch electrode can also be used as the touch driving electrode TX, and the second touch electrode can be used as the touch sensing electrode RX. Figure 2 and Figure 3 As shown, the touch driving electrode TX and the touch sensing electrode RX are arranged crosswise, and the intersection of the touch driving electrode TX and the touch sensing electrode RX is separated by the touch insulating layer TLD. The touch sensing electrode RX includes a plurality of first electrode units RX1 arranged along the first direction and a bridge portion RX2 connected between two adjacent first electrode units RX1; the touch driving electrode TX includes: a plurality of second electrode units TX1 arranged along the second direction and a connecting portion TX2 connected between the second electrode units TX1. The touch driving electrode TX and the first electrode unit RX1 are located in the second touch graphic layer 42, the bridge portion RX2 is located in the first touch graphic layer 41, and the first electrode unit is electrically connected to the bridge portion RX2 through a via penetrating the touch insulating layer TLD. Of course, in other examples, the touch driving electrode TX and the first electrode unit RX1 can also be arranged in the first touch graphic layer 41, and the bridge portion RX2 can be arranged in the second touch graphic layer 42.

[0066] In some embodiments, the second touch graphic layer 42 and the first touch graphic layer 41 are both made of metal materials. For example, the first electrode unit, the second electrode unit, the connecting portion TX2 and the bridging portion RX2 are all made of a metal mesh structure.

[0067] Of course, the first touch graphic layer 41 and the second touch graphic layer 42 may also be arranged in other ways. For example, one of the first touch graphic layer 41 and the second touch graphic layer 42 includes multiple first touch electrodes, and the other includes multiple second touch electrodes. The first touch electrodes and the second touch electrodes are arranged crosswise and insulated.

[0068] In some embodiments, the touch display panel may further include a touch signal line (not shown), the touch signal line is located in the peripheral area PA, and the touch drive electrode TX and the touch sensing electrode RX are electrically connected to the touch drive chip through the corresponding touch signal line. In one example, the touch signal line may be a double-layer structure, for example, the touch signal line includes a first wire arranged in the same layer as the first touch graphic layer and a second wire arranged in the same layer as the second touch graphic layer, and the first wire is electrically connected to the second wire through a plurality of vias to reduce the resistance of the touch signal line.

[0069] In some embodiments, Figure 1AAs shown, the touch flat layer TOC is located on the side of the touch electrode layer 40 away from the substrate SUB; the gray filter layer 50 is located on the side of the touch flat layer TOC away from the substrate SUB. The light shielding layer BM is located on the side of the touch electrode layer 40 away from the substrate SUB. When the gray filter layer 50 is provided on the side of the touch flat layer TOC away from the substrate SUB, the light shielding layer BM is located on the side of the gray filter layer 50 away from the substrate SUB. The light shielding layer BM has a plurality of light through holes, and the orthographic projection of the light through holes on the substrate SUB overlaps with the orthographic projection of the light emitting device 20 on the substrate SUB, and the orthographic projection of the light shielding layer BM on the substrate SUB covers the orthographic projection of the first touch graphic layer 41 and the second touch graphic layer 42 on the substrate SUB, thereby reducing the reflection of the first touch graphic layer 41 and the second touch graphic layer 42 on the ambient light, and reducing the surface reflectivity of the touch display panel.

[0070] In some embodiments, the thickness of the gray filter layer 50 is less than or equal to 5 micrometers to reduce the attenuation of the light of the light emitting device 20 in the gray filter layer 50. For example, the thickness of the gray filter layer 50 is between 3 and 5 micrometers.

[0071] In some embodiments, Figure 1A As shown, the cover layer COC is located on the side of the light shielding layer BM away from the substrate SUB, and the cover layer COC can be made of organic material.

[0072] In some embodiments, Figure 1A As shown, a cover plate CG is arranged on the side of the cover layer COC away from the substrate SUB, and the cover layer COC is bonded to the cover plate CG via an optical adhesive layer OCA.

[0073] for Figure 1A The manufacturing method of the touch display panel shown may include the following steps:

[0074] S1. Forming a plurality of first electrodes 21 of the light emitting devices 20 on the substrate SUB on which the driving circuit layer 10 is formed. For example, a metal layer is firstly sputtered and then the metal layer is patterned, so as to form a plurality of first electrodes 21.

[0075] S2, sequentially forming a pixel definition layer PDL and a spacer PS. For example, the formation process of the pixel definition layer PDL and the spacer PS includes coating an organic material, exposure and development.

[0076] S3. Form the light-emitting layer 23 of each light-emitting device 20 by using an evaporation process.

[0077] S4, forming a second electrode layer. For example, the second electrode layer can be formed by evaporating a metal layer.

[0078] S5. Forming a first inorganic encapsulation layer 31 by using a chemical vapor deposition (CVD) process.

[0079] S6, using inkjet printing process to form an organic encapsulation layer 33 to cover the nanoparticles deposited on the substrate in the previous process. Specifically, in step S6, a liquid organic material layer is first printed, and then the organic material layer is solidified after being leveled, so as to form an organic encapsulation layer 33 with a flat surface.

[0080] S7 . Forming a second inorganic encapsulation layer 32 by using a chemical vapor deposition (CVD) process.

[0081] S8. Forming a touch buffer layer TBL of an inorganic material by using a chemical vapor deposition process, or forming a touch buffer layer TBL of an organic material by inkjet printing or coating, exposure, and development.

[0082] S9 , sputtering a metal layer on the touch buffer layer TBL and performing patterning to form a first touch pattern layer 41 .

[0083] S10 , forming a touch insulating layer TLD by chemical vapor deposition or coating, exposure, and development, and patterning the layer to form a via hole penetrating the touch insulating layer TLD.

[0084] S11 , sputtering a metal layer on the touch insulating layer TLD and patterning it to form a second touch pattern layer 42 , a portion of the second touch pattern layer 42 is electrically connected to the first touch pattern layer 41 through a via hole.

[0085] S12, forming a touch control flat layer TOC by inkjet printing or coating, exposure, and development.

[0086] S13, forming the gray filter layer 50 by coating, exposing, and developing; or forming the gray filter layer 50 by inkjet printing.

[0087] S14, forming a light shielding layer BM by inkjet printing or coating, exposure, and development.

[0088] S15, forming a cover layer COC by inkjet printing or coating, exposure, and development.

[0089] Afterwards, the cover plate CG may be bonded to the side of the cover layer COC away from the substrate SUB by using the optical adhesive layer OCA.

[0090] Figure 4 is a schematic diagram of a second touch display panel provided in some embodiments of the present disclosure, Figure 4 The touch display panel shown is Figure 1ASimilar, the difference between the two is introduced below.

[0091] exist Figure 4 In the embodiment, the gray filter layer 50 is located between the packaging structure 30 and the touch electrode layer 40 to be reused as a touch buffer layer. The touch electrode layer 40 is located on the side of the gray filter layer 50 away from the substrate SUB. For example, the touch electrode layer 40 contacts the surface of the gray filter layer 50 away from the substrate SUB to improve the adhesion effect of the touch electrode layer 40. In addition, the gray filter layer 50 is no longer provided on the side of the touch flat layer TOC away from the substrate SUB. In this case, no separate process is required to make the touch buffer layer. Therefore, compared with Figure 1A The touch display panel shown can reduce one patterning process, thereby further simplifying the manufacturing process. Figure 4 The gray filter layer 50 in the embodiment can be made of organic material.

[0092] exist Figure 4 In the figure, the shading layer BM is located on the side of the touch electrode layer 40 away from the substrate SUB. When the gray filter layer is no longer set on the side of the touch flat layer TOC away from the substrate SUB, the shading layer BM can be directly set on the surface of the touch flat layer TOC away from the substrate SUB, and part of the covering layer COC is in contact with the touch flat layer TOC.

[0093] exist Figure 4 In the embodiment, the surface of the encapsulation structure 30 away from the substrate SUB is a flat surface, and the gray filter layer 50 is bonded to the surface of the encapsulation structure 30 away from the substrate SUB. The "bonding" here means that there is no gap between the surface of the gray filter layer 50 facing the substrate SUB and the surface of the encapsulation structure 30 away from the substrate SUB. The thickness of the gray filter layer 50 is less than the maximum thickness of the organic encapsulation layer 33, thereby preventing the gray filter layer 50 from being too thick, which causes the outgoing light of the light emitting device 20 to be significantly attenuated after passing through the gray filter layer 50.

[0094] In one example, the thickness of the gray filter layer 50 is less than or equal to 2 / 3 of the maximum thickness of the organic encapsulation layer 33. For example, the thickness of the gray filter layer 50 is less than or equal to 1 / 2 of the maximum thickness of the organic encapsulation layer 33. For example, the maximum thickness of the organic encapsulation layer 33 is between 10 and 12 microns, and the thickness of the gray filter layer 50 is less than or equal to 5 microns.

[0095] It should be noted that the “flat surface” in the embodiment of the present disclosure refers to a substantially flat surface, which may have fluctuations due to process errors. For example, the distance between any two positions on the surface and the substrate SUB does not exceed twice the thickness of the second inorganic encapsulation layer 32 .

[0096] Figure 4 The rest of the structures in Figure 1AThe description is not repeated here.

[0097] for Figure 4 The manufacturing method of the touch display panel shown may include the above steps S1 to S7, and then the following steps:

[0098] S28, forming a gray filter layer 50 of an organic material by inkjet printing or coating, exposure, and development.

[0099] S29 , sputtering a metal layer on the gray filter layer 50 and performing patterning to form a first touch control pattern layer 41 .

[0100] S210 , forming a touch insulating layer TLD by chemical vapor deposition or coating, exposure, and development, and patterning the layer to form a via hole penetrating the touch insulating layer TLD.

[0101] S211 , sputtering a metal layer on the touch insulating layer TLD and patterning it to form a second touch pattern layer 42 , a portion of the second touch pattern layer 42 is electrically connected to the first touch pattern layer 41 through a via hole.

[0102] S212 , forming a touch control flat layer TOC by inkjet printing or coating, exposure, and development.

[0103] S213, forming a light shielding layer BM by inkjet printing or coating, exposure, and development.

[0104] S214, forming a cover layer COC by inkjet printing or coating, exposure, and development.

[0105] Afterwards, the cover plate CG may be bonded to the side of the cover layer COC away from the substrate SUB by using the optical adhesive layer OCA.

[0106] Figure 5 is a schematic diagram of a third touch display panel provided in some embodiments of the present disclosure, Figure 5 The touch display panel shown is Figure 4 Similar, only the difference between the two is introduced below.

[0107] exist Figure 5 In the embodiment, the surface of the packaging structure 30 away from the substrate SUB is no longer a flat surface, but has a recessed portion 30a corresponding to the light emitting device 20, and the recessed portion 30a is filled with a gray filter layer 50, and the surface of the gray filter layer 50 away from the substrate SUB is a flat surface. The gray filter layer 50 is made of organic material.

[0108] The cross-sectional area of ​​the recessed portion 30 a gradually decreases in a direction approaching the substrate SUB. The cross-sectional area of ​​the recessed portion 30 a refers to the area of ​​a cross section of the recessed portion 30 a perpendicular to the thickness direction of the substrate SUB.

[0109] In one example, the orthographic projection of the bottom of the recessed portion 30a on the substrate SUB is within the orthographic projection range of the pixel opening on the substrate SUB. The recessed portion 30a has a top opening facing away from the substrate SUB, and the orthographic projection of the top opening of the recessed portion 30a on the substrate SUB is also within the orthographic projection range of the pixel opening on the substrate SUB.

[0110] Specifically, if Figure 5 As shown, the encapsulation structure 30 includes a first inorganic encapsulation layer 31, an organic encapsulation layer 33, and a second inorganic encapsulation layer 32 which are sequentially arranged in a direction away from the substrate SUB, wherein the first inorganic encapsulation layer 31, the organic encapsulation layer 33, and the second inorganic encapsulation layer 32 are all bent toward the substrate SUB at positions corresponding to the light-emitting device 20. The surface of the encapsulation structure 30 away from the substrate SUB is the surface of the second inorganic encapsulation layer 32 away from the substrate SUB. Since the first inorganic encapsulation layer 31, the organic encapsulation layer 33, and the second inorganic encapsulation layer 32 are all bent toward the substrate SUB at positions corresponding to the light-emitting device 20, the above-mentioned recessed portion 30a is formed at a position corresponding to the light-emitting device 20 in the surface of the encapsulation structure 30 away from the substrate SUB, wherein the orthographic projections of the bent portions of the first inorganic encapsulation layer 31, the organic encapsulation layer 33, and the second inorganic encapsulation layer 32 on the substrate SUB all cover the orthographic projections of the recessed portion 30a on the substrate SUB.

[0111] Among them, Figure 4 compared to, Figure 5 The thickness of the first inorganic encapsulation layer 31 in the embodiment does not change; Figure 5 The thickness of the organic encapsulation layer 33 in the process is reduced. At this time, the leveling effect of the organic encapsulation layer 32 during the manufacturing process is reduced, so that Figure 5 The surface of the organic encapsulation layer 32 away from the substrate SUB is no longer flat, but forms a depression at a position corresponding to the pixel opening; Figure 5 The thickness of the second inorganic encapsulation layer 32 is compared with Figure 4 No change occurs, so that after the second inorganic encapsulation layer 32 is formed, a recess 30 a is formed on the surface of the second inorganic encapsulation layer 32 away from the substrate SUB (ie, the surface of the encapsulation structure 30 away from the substrate SUB).

[0112] Compared to Figure 4 In terms of Figure 5 In the embodiment, the thickness of the organic encapsulation layer 33 is smaller, thereby reducing the light attenuation of the light in the encapsulation structure 30.

[0113] The maximum thickness of the gray filter layer 50 is less than the maximum thickness of the organic encapsulation layer 33, thereby reducing the attenuation of light in the gray filter layer 50 and saving materials. Figure 5The maximum thickness of the organic encapsulation layer 33 is less than or equal to 8 microns, and the maximum thickness of the gray filter layer 50 is less than or equal to 5 microns; for example, the maximum thickness of the organic encapsulation layer 33 is between 6 and 8 microns, and the maximum thickness of the gray filter layer 50 is between 3 and 5 microns.

[0114] and Figure 4 compared to, Figure 4 The maximum thickness of the organic encapsulation layer 33 is between 10 and 12 microns, and the thickness of the gray filter layer 50 is less than or equal to 5 microns. When the maximum thickness of the organic encapsulation layer 33 is set to 12 microns and the thickness of the gray filter layer 50 is 5 microns, the total thickness of the organic encapsulation layer 33 and the gray filter layer 50 above the light emitting device 50 is 12+5=17 microns; and Figure 5 In the touch display panel shown in FIG. 1 , the maximum thickness of the organic encapsulation layer 33 is set to 8 microns, and the maximum thickness of the gray filter layer 50 is set to 5 microns. Then, the total thickness of the organic encapsulation layer 33 and the gray filter layer 50 above the light emitting device 50 is 8+5=13 microns. Figure 4 The arrangement in the embodiment is smaller, thereby further reducing the light attenuation of light at various angles in the packaging structure 30 and the gray filter layer 50.

[0115] Figure 6 is a schematic diagram of a fourth touch display panel provided in some embodiments of the present disclosure, Figure 6 The touch display panel shown is Figure 4 Similar, except that Figure 6 In the embodiment, the cover layer COC is no longer provided on the side of the light shielding layer BM away from the substrate SUB, thereby further simplifying the manufacturing process.

[0116] When the cover layer COC is not disposed on the side of the light shielding layer BM away from the substrate SUB, the cover plate CG can be directly bonded to the side of the light shielding layer BM and the touch flat layer COC away from the substrate SUB using the optical adhesive layer OCA.

[0117] Figure 7 is a schematic diagram of a fifth touch display panel provided in some embodiments of the present disclosure, Figure 7 The touch display panel shown is Figure 4 Similar, only the difference between the two is introduced below.

[0118] exist Figure 7 In the touch display panel shown, the touch flat layer TOC is no longer disposed between the second touch graphic layer 42 and the light shielding layer BM, so that the light shielding layer BM is in direct contact with the second touch graphic layer 42, thereby further simplifying the structure of the touch display panel and simplifying the manufacturing process.

[0119] Further, such as Figure 7As shown, the light shielding layer BM covers the second touch graphic layer 42, thereby further preventing the touch electrode layer 40 from reflecting the external ambient light. As mentioned above, the touch driving electrodes and the first electrode units in the second touch graphic layer 42 can adopt a metal grid structure. In this case, the light shielding layer BM covers the second touch graphic layer 42, which means that the light shielding layer BM covers the top surface and side surfaces of the metal wires in the metal grid structure.

[0120] Figure 8 is a schematic diagram of a sixth touch display panel provided in some embodiments of the present disclosure, Figure 8 The touch display panel shown is Figure 7 Similar, except that Figure 8 In the embodiment, the cover layer COC is no longer provided on the side of the light shielding layer BM away from the substrate SUB, thereby further simplifying the structure of the touch display panel and simplifying the manufacturing process.

[0121] When the cover layer COC is not disposed on the side of the light shielding layer BM away from the substrate SUB, the cover plate CG can be directly bonded to the side of the light shielding layer BM and the touch flat layer COC away from the substrate SUB using the optical adhesive layer OCA.

[0122] It should be noted that for Figure 5 The touch display panel shown can also refer to Figure 6 , Figure 7 , Figure 8 The design method saves Figure 5 The touch flat layer TOC and / or cover layer COC in the device.

[0123] Fig. 9 is a schematic diagram of a seventh touch display panel provided in some embodiments of the present disclosure, Fig. 9 The touch display panel shown is Figure 1A Similar, except that Fig. 9 In the embodiment, the gray filter layer 50 is located between the first touch pattern layer 41 and the second touch pattern layer 42, that is, the gray filter layer 50 is multiplexed as a touch insulating layer. Figure 1A The difference is that in Fig. 9 In the embodiment, the gray filter layer 50 is no longer provided on the side of the touch flat layer TOC away from the substrate SUB. At this time, the shading layer BM is located on the surface of the touch flat layer TOC away from the substrate SUB, the covering layer COC covers the shading layer BM and part of the covering layer COC contacts the touch flat layer COC.

[0124] Compared to Figure 1A In terms of structure, Fig. 9The touch display panel shown reuses the gray filter layer 50 as a touch insulating layer, and no gray filter layer 50 is provided on the side of the touch flat layer TOC away from the substrate SUB, which can reduce one patterning process and simplify the manufacturing process.

[0125] for Fig. 9 The manufacturing method of the touch display panel shown may include the above steps S1 to S8, and then the following steps:

[0126] S39 , sputtering a metal layer on the touch buffer layer TBL and performing patterning to form a first touch pattern layer 41 .

[0127] S310 , forming a gray filter material layer, and exposing and developing it, so as to form a gray filter layer 50 with via holes.

[0128] S311 , sputtering a metal layer on the gray filter layer 50 and patterning it to form a second touch pattern layer 42 , a portion of the second touch pattern layer 42 is electrically connected to the first touch pattern layer 41 through a via hole.

[0129] S312 , forming a touch control flat layer TOC by inkjet printing or coating, exposure, and development.

[0130] S313, forming a light shielding layer BM by inkjet printing or coating, exposure, and development.

[0131] S314, forming a cover layer COC by inkjet printing or coating, exposure, and development.

[0132] Afterwards, the cover plate CG may be bonded to the side of the cover layer COC away from the substrate SUB by using the optical adhesive layer OCA.

[0133] Fig.10 is a schematic diagram of an eighth touch display panel provided in some embodiments of the present disclosure, Fig.10 The touch display panel shown is Figure 5 Similar, except that Fig.10 In the embodiment, the material of the touch insulating layer TLD is the same as the material of the gray filter layer 50 (touch buffer layer), thereby improving material utilization, reducing the frequency of changing the glue, and reducing the production cost.

[0134] The sum of the thicknesses of the touch insulating layer TLD and the gray filter layer 50 is less than or equal to the maximum thickness of the organic encapsulation layer 33. Setting the total thickness of the touch insulating layer TLD and the gray filter layer 50 to be smaller can reduce the attenuation of the light emitted by the light emitting device 20 caused by the touch insulating layer TLD and the gray filter layer 50.

[0135] In one example, the maximum thickness of the organic encapsulation layer 33 is less than or equal to 8 microns, and the sum of the thicknesses of the touch insulating layer TLD and the gray filter layer 50 is less than or equal to 5 microns. For example, the maximum thickness of the organic encapsulation layer 33 is between 6 and 8 microns, and the sum of the thicknesses of the touch insulating layer TLD and the gray filter layer 50 is between 3 and 5 microns.

[0136] It should be noted that Fig.10 It is equivalent to Figure 5 On the basis of Figure 5 The touch insulating layer TLD in the embodiment is formed by using the same material as the gray filter layer 50. Of course, in other examples, it can also be formed by using the same material as the gray filter layer 50. Figure 4 , Figure 6 , Figure 7 , Figure 8 On the basis of any one of the above, the material of the touch insulating layer TLD is set to be the same as that of the gray filter layer 50 .

[0137] Fig.11 is a schematic diagram of a ninth touch display panel provided in some embodiments of the present disclosure, Fig.11 The touch display panel shown is Fig.10 Similar, except that Fig.11 In the embodiment, the material of the touch insulating layer TLD and the material of the organic encapsulation layer 33 are the same as the material of the gray filter layer 50 (touch buffer layer), thereby further improving the material utilization rate and reducing the production cost.

[0138] It should be noted that in Fig.11 In the embodiment, the organic encapsulation layer 33 and the gray filter layer 50 may be made of the same material, while the touch insulating layer TLD may be made of different materials.

[0139] Fig.12 is a schematic diagram of a tenth touch display panel provided in some embodiments of the present disclosure, Fig.12 The touch display panel shown is Figure 4 Similar, except that Fig.12 In the embodiment, the material of the organic encapsulation layer 33 is the same as the material of the gray filter layer 50, thereby improving the material utilization rate and reducing the production cost.

[0140] It should be noted that in Fig.12 In the embodiment, the organic encapsulation layer 33 and the touch insulating layer TLD may also be made of the same material as the gray filter layer 50 .

[0141] Fig.13 is a schematic diagram of an eleventh touch display panel provided in some embodiments of the present disclosure, Fig.13 The touch display panel shown is Figure 1A Similar, except that Fig.13In the embodiment, the gray filter layer 50 is located between the first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 32 , and the gray filter layer 50 is multiplexed as an organic encapsulation layer.

[0142] In addition, Figure 1A The difference is that in Fig.13 In the embodiment, the gray filter layer 50 is no longer disposed on the side of the touch flat layer TOC away from the substrate SUB, the light shielding layer BM is located on the surface of the touch flat layer TOC away from the substrate SUB, and part of the cover layer COC contacts the touch flat layer TOC.

[0143] and Figure 1A compared to, Fig.13 The touch display panel reuses the gray filter layer as the organic encapsulation layer, thereby making the overall structure of the touch display panel simpler and reducing one process step.

[0144] exist Fig.13 In the embodiment, the gray filter layer 50 can be formed by coating, exposure, and development. The maximum thickness of the gray filter layer 50 can be less than or equal to 5 micrometers, thereby reducing the attenuation of the light of the light emitting device 20 in the gray filter layer 50.

[0145] It should be noted that in Fig.13 In the embodiment, the touch insulating layer TLD may be made of inorganic material, or may be made of the same material as the gray filter layer 50 .

[0146] It should also be noted that for Figures 9 to 13 The touch display panel shown in Figure 6 , Figure 7 , Figure 8 The design method eliminates the need for a touch flat layer TOC and / or a cover layer COC.

[0147] Fig.14 The diagram is a connection diagram of the driving circuit layer 10 and the light emitting device 20 provided in some embodiments of the present disclosure. In some embodiments, the driving circuit layer 10 includes a plurality of pixel circuits, and the pixel circuits are electrically connected to the light emitting device 20 to provide driving signals for the light emitting device 20. The pixel electrode may include a plurality of transistors T1 and at least one capacitor C1. Fig.14 Only one transistor T1 and one capacitor C1 are shown schematically.

[0148] In some embodiments, the semiconductor layer is disposed on the substrate SUB. The material of the semiconductor layer may include, for example, an inorganic semiconductor material (e.g., polycrystalline silicon, amorphous silicon, etc.), an organic semiconductor material, and an oxide semiconductor material. The semiconductor layer includes an active layer T1a of each transistor T1, and the active layer T1a includes a channel portion and a source connection portion and a drain connection portion located on both sides of the channel portion, the source connection portion is connected to the source T1s of the transistor T1, and the drain connection portion is connected to the drain T1d of the transistor T1. The source connection portion and the drain connection portion may be doped with impurities (e.g., N-type impurities or P-type impurities) with a higher impurity concentration than the channel portion. The channel portion is directly opposite to the gate T1g of the transistor T1. When the voltage signal loaded on the gate T1g reaches a certain value, a carrier path is formed in the channel portion, forming a source T1s and a drain T1d of the transistor T1 to be turned on.

[0149] In one example, in order to prevent or reduce diffusion of metal atoms and / or impurities from the substrate SUB into the active layer T1 a of the transistor T1 , a buffer layer BFL may be disposed between the semiconductor layer and the substrate SUB.

[0150] In some embodiments, the first gate insulating layer GI1 is disposed on the semiconductor layer, and the material of the first gate insulating layer GI1 may include a silicon compound. For example, the material of the first gate insulating layer GI1 includes silicon oxynitride (SiON), silicon oxide (SiOx), silicon nitride (SiNx), silicon oxycarbide (SiOxCy), silicon carbide nitride (SiCxNy), etc. In addition, the first gate insulating layer GI1 may be a single layer or a multilayer.

[0151] In some embodiments, the first gate electrode layer is disposed on the first gate insulating layer GI1. The first gate electrode layer includes the gate T1g of each transistor T1 and the first electrode plate C11 of the capacitor C1. The material of the first gate electrode layer may include, for example, metal, metal alloy, metal nitride, conductive metal oxide, transparent conductive material, etc. For example, the first gate electrode layer may include gold (Au), gold alloy, silver (Ag), silver alloy, aluminum (Al), aluminum alloy, aluminum nitride (AlNx), tungsten (W), tungsten nitride (WNx), copper (Cu), copper alloy, nickel (Ni), chromium (Cr), chromium nitride (CrNx), molybdenum (Mo), molybdenum alloy, titanium (Ti), titanium nitride (TiNx), platinum (Pt), tantalum (Ta), tantalum nitride (TaNx), neodymium (Nd), scandium (Sc), strontium ruthenium oxide (SRO), zinc oxide (ZnOx), tin oxide (SnOx), indium oxide (InOx), gallium oxide (GaOx), indium tin oxide (ITO), indium zinc oxide (IZO), etc. The first gate electrode layer may have a single layer or multiple layers.

[0152] In some embodiments, Fig.14As shown, the second gate insulating layer GI2 is disposed on the first gate electrode layer G1, and the material of the second gate insulating layer GI2 can be selected from the materials of the first gate insulating layer GI1 listed above. The second gate insulating layer GI2 can be formed as a single layer or multiple layers.

[0153] In some embodiments, Fig.14 As shown, the second gate electrode layer is disposed on the second gate insulating layer GI2. The second gate electrode layer may include a second electrode plate C12 of the capacitor. The material of the second gate electrode layer is selected from the materials of the first gate electrode layer listed above. The second gate electrode layer may have a single layer or multiple layers.

[0154] In some embodiments, Fig.14 As shown, the interlayer insulating layer ILD is disposed on the second gate electrode layer, and the material of the interlayer insulating layer ILD may include, for example, silicon compounds, metal oxides, etc. Specifically, the silicon compounds and metal oxides listed above may be selected, and will not be described in detail here.

[0155] In some embodiments, Fig.14 As shown, the source-drain conductive layer is disposed on the interlayer insulating layer ILD. The source-drain conductive layer may include a source T1s and a drain T1d of each transistor T1 in the display area, the source T1s is electrically connected to the source T1s connection portion, and the drain T1d is electrically connected to the drain T1d connection portion. The source-drain conductive layer may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc. For example, the source-drain conductive layer may be a single layer or multiple layers composed of a metal, such as Mo / Al / Mo or Ti / Al / Ti. Fig.14 The transistor T1 shown includes a gate T1g, a source T1s33, a drain T1d and an active layer T1a.

[0156] In some embodiments, Fig.14 As shown, the passivation layer PVX is disposed on the first source-drain conductive layer, and the material of the passivation layer PVX may include a silicon compound, such as silicon oxide, silicon nitride or silicon oxynitride.

[0157] In some embodiments, Fig.14 As shown, the planarization layer PLN is located on the side of the passivation layer PVX away from the substrate SUB, and the surface of the planarization layer PLN away from the substrate SUB is substantially flat. The planarization layer PLN is made of an organic insulating material, for example, the organic insulating material includes resin materials such as polyimide, epoxy resin, acrylic, polyester, photoresist, polyacrylate, polyamide, siloxane, etc. For another example, the organic insulating material includes an elastic material, for example, ethyl formate, thermoplastic polyurethane (TPU), etc.

[0158] In some embodiments, Fig.14As shown, the first electrode 21 of the light emitting device 20 is arranged on the side of the planarization layer PLN away from the substrate SUB, and is electrically connected to the drain T1d of the transistor T1 through a via hole penetrating the planarization layer PLN. The first electrode 21 can be made of materials such as metal, metal alloy, metal nitride, conductive metal oxide, transparent conductive material, etc. The first electrode 21 can be a single layer or multi-layer structure.

[0159] The embodiment of the present disclosure also provides a touch display device, including the touch display panel in the above embodiment. The touch display panel may also include a touch chip, which is used to provide a touch drive signal to the touch electrode layer and receive a sensing signal on the touch electrode layer, so as to determine the touch position according to the sensing signal. The touch display panel in the embodiment of the present disclosure adopts a gray filter layer 50 to filter light, thereby reducing the reflection of ambient light by the touch display panel, and the gray filter layer 50 corresponding to each light-emitting device 20 is the same, and only one composition process is required to make the gray filter layer 50, thereby simplifying the manufacturing process and reducing production costs. Furthermore, the gray filter layer 50 can also be reused as a touch buffer layer, thereby further simplifying the manufacturing process. Therefore, the manufacturing process of the touch display device using the above touch display panel is also simplified accordingly.

[0160] The touch display device may include any device or product with a display function. For example, the touch display device may be a smart phone, a mobile phone, an e-book reader, a desktop computer (PC), a laptop PC, a netbook PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a digital audio player, a mobile medical device, a camera, a wearable device (such as a head-mounted device, an electronic garment, an electronic bracelet, an electronic necklace, an electronic accessory, or a smart watch), a television, etc.

[0161] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A touch display panel, comprising: substrate; A plurality of light-emitting devices are disposed on the substrate, wherein the light-emitting colors of the plurality of light-emitting devices include multiple colors; A packaging structure, located on a side of the plurality of light-emitting devices away from the substrate; A touch electrode layer, located on a side of the packaging structure away from the substrate; A gray filter layer is located between the packaging structure and the touch electrode layer to be reused as a touch buffer layer; the orthographic projection of the gray filter layer on the substrate overlaps with the orthographic projection of the plurality of light emitting devices on the substrate.

2. The touch display panel according to claim 1, wherein: The transmission spectrum curve of the gray filter layer has a plurality of peaks, and the plurality of peaks correspond one by one to the light beams of a plurality of colors emitted by the plurality of light emitting devices.

3. The touch display panel according to claim 1, wherein: The surface of the packaging structure away from the substrate has a recessed portion corresponding to the light-emitting device, the recessed portion is filled with the gray filter layer, and the surface of the gray filter layer away from the substrate is a flat surface.

4. The touch display panel according to claim 3, wherein: The encapsulation structure includes: a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are arranged in sequence along a direction away from the substrate. The first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are all bent toward the substrate at positions corresponding to the light-emitting device.

5. The touch display panel according to claim 4, wherein: The maximum thickness of the gray filter layer is less than the maximum thickness of the organic encapsulation layer.

6. The touch display panel according to claim 1, wherein: The surface of the packaging structure away from the substrate is a flat surface, and the gray filter layer is attached to the flat surface.

7. The touch display panel according to claim 6, wherein: The encapsulation structure comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer which are sequentially arranged in a direction away from the substrate, and the thickness of the gray filter layer is less than or equal to 2 / 3 of the maximum thickness of the organic encapsulation layer.

8. The touch display panel according to claim 1, wherein: The encapsulation structure comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer which are sequentially arranged in a direction away from the substrate, and the material of the organic encapsulation layer is the same as that of the gray filter layer.

9. The touch display panel according to any one of claims 1 to 8, wherein: The touch electrode layer includes: a first touch graphic layer, a touch insulating layer, and a second touch graphic layer, which are sequentially arranged in a direction away from the substrate. The touch insulating layer is made of the same material as the gray filter layer.

10. The touch display panel according to any one of claims 1 to 8, wherein: The transmittance of the gray filter layer to the light of various colors emitted by the plurality of light emitting devices is greater than 42%.

11. The touch display panel according to any one of claims 1 to 8, wherein: The touch display panel further includes a light shielding layer, the light shielding layer is located on a side of the touch electrode layer away from the substrate, the light shielding layer has a plurality of light openings, and the orthographic projection of the light emitting device on the substrate overlaps with the orthographic projection of the light openings on the substrate; The touch electrode layer includes: a first touch graphic layer, a touch insulating layer, and a second touch graphic layer, which are arranged in sequence along a direction away from the substrate, and the materials of the first touch graphic layer and the second touch graphic layer both include metal; the orthographic projections of the first touch graphic layer and the second touch graphic layer on the substrate are both located within the orthographic projection range of the light shielding layer on the substrate.

12. The touch display panel according to claim 11, wherein: The second touch pattern layer contacts the light shielding layer.

13. The touch display panel according to claim 12, wherein: The light shielding layer covers the second touch control graphic layer.

14. The touch display panel according to claim 11, wherein: The touch electrode layer includes a plurality of first touch electrodes extending along a first direction, and a plurality of second touch electrodes extending along a second direction, wherein the first touch electrodes include a plurality of first electrode units arranged along the first direction, and a bridge portion electrically connected between two adjacent first electrode units; the first electrode units are electrically connected to the bridge portion through via holes penetrating the touch insulating layer; The first electrode unit and the second touch electrode are both located in one of the first touch graphic layer and the second touch graphic layer, and the bridge portion is located in the other of the first touch graphic layer and the second touch graphic layer.

15. The touch display panel according to claim 11, wherein: The touch display panel also includes: A touch flat layer, located between the touch electrode layer and the light shielding layer; The covering layer is located on a side of the light shielding layer away from the substrate.

16. A touch display device, wherein: A touch display panel comprising any one of claims 1 to 15.

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