Touch display panel, method for manufacturing touch display panel and display device

Abstract

A touch display panel includes a display layer, a touch layer, and an optical functional layer. The display layer includes a substrate and a light-emitting layer, and the light-emitting layer includes at least one light-emitting portion. The touch layer is disposed on the light-emitting side of the display layer. The touch layer includes a first touch metal layer and a second touch metal layer disposed on the side of the first touch metal layer away from the display layer, with the first touch metal and the second touch metal at least partially facing each other. The optical functional layer is disposed on the light-emitting side of the display layer. The optical functional layer includes a first light-collecting layer and a second light-collecting layer located on the side of the first light-collecting layer away from the display layer. The first light-collecting layer is disposed between the first touch metal layer and the second touch metal layer, and the first light-collecting layer includes a portion located between the facing first touch metal and the second touch metal; or, the second light-collecting layer is disposed between the first touch metal layer and the second touch metal layer, and the second light-collecting layer includes a portion located between the facing first touch metal and the second touch metal.

Description

Touch display panel, preparation method of touch display panel and display device TECHNICAL FIELD

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

[0002] With the continuous development of the display industry, users have increasingly high demands for energy saving of display devices, and therefore, integrating a power consumption reduction design on a display screen of a display device has become a development focus.

[0003] SUMMARY

[0004] In one aspect, a touch display panel is provided, including a display layer, a touch layer and an optical function layer, the display layer includes a substrate and a light-emitting layer away from the substrate, the light-emitting layer includes at least one light-emitting part; the touch layer is arranged on the light-emitting side of the display layer; the touch layer includes a first touch metal layer and a second touch metal layer arranged on the side of the first touch metal layer away from the display layer, the first touch metal layer includes at least one first touch metal, the second touch metal layer includes at least one second touch metal, the first touch metal and the second touch metal at least partially face each other, and the orthographic projection of the first touch metal and the second touch metal on the substrate does not overlap with the orthographic projection of the light-emitting part on the substrate; the optical function layer is arranged on the light-emitting side of the display layer; the optical function layer includes a first light-taking layer and a second light-taking layer arranged on the side of the first light-taking layer away from the display layer; the first light-taking layer is arranged between the first touch metal layer and the second touch metal layer, and the first light-taking layer includes a part between the facing first touch metal and second touch metal; or, the second light-taking layer is arranged between the first touch metal layer and the second touch metal layer, and the second light-taking layer includes a part between the facing first touch metal and second touch metal.

[0005] In some embodiments, the first light-taking layer is arranged between the first touch metal layer and the second touch metal layer, the first light-taking layer includes at least one light-taking part and a separation part, one light-taking part corresponds to one light-emitting part, and the separation part is between the facing first touch metal and second touch metal; the at least one light-taking part and the separation part are arranged at intervals; the second light-taking layer is arranged on the side of the second touch metal layer away from the display layer, and the second light-taking layer at least covers the side surface of the light-taking part.

[0006] In some embodiments, the second light-taking layer covers all the light-taking parts.

[0007] In some embodiments, the optical functional layer further comprises a black matrix layer, a light-blocking color film layer, and a protective layer; the black matrix layer is arranged between the second light-taking layer and the second touch metal layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate; the light-blocking color film layer is arranged on a side of the second light-taking layer away from the display layer, the light-blocking color film layer comprises at least one light-blocking part, and one light-blocking part corresponds to one light-emitting part; and the protective layer is arranged on a side of the light-blocking color film layer away from the display layer.

[0008] In some embodiments, the optical functional layer further comprises a black matrix layer and a gray color film layer; the black matrix layer is arranged between the second light-taking layer and the second touch metal layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate; and the gray color film layer is arranged on a side of the second light-taking layer away from the display layer, and the gray color film layer is configured to allow light of a corresponding color emitted by at least one light-emitting part to pass through.

[0009] In some embodiments, the second light-taking layer is further configured to comprise at least one light-blocking part, and one light-blocking part corresponds to one light-emitting part; the optical functional layer further comprises a black matrix layer and a protective layer; the black matrix layer is arranged between the second light-taking layer and the second touch metal layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate; and the protective layer is arranged on a side of the second light-taking layer away from the display layer.

[0010] In some embodiments, the second light-taking layer is further configured to allow light of a corresponding color emitted by at least one light-emitting part to pass through; and the optical functional layer further comprises a black matrix layer, the black matrix layer is arranged between the second light-taking layer and the second touch metal layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate.

[0011] In some embodiments, the black matrix covers the isolation part of the first light-taking layer.

[0012] In some embodiments, the second light-taking layer is arranged between the first touch metal layer and the second touch metal layer, and the first light-taking layer is arranged between the display layer and the second light-taking layer; the first light-taking layer comprises at least one light-taking part, one light-taking part corresponds to one light-emitting part, and a projection of the light-taking part on the substrate covers a projection of the light-emitting part on the substrate; the second light-taking layer covers at least a side surface of the light-taking part, and the second light-taking layer comprises a part located between the first touch metal and the second touch metal.

[0013] In some embodiments, the second light-taking layer covers all the light-taking parts.

[0014] In some embodiments, the optical functional layer further comprises a black matrix layer, a light-blocking color film layer, and a protective layer; the black matrix layer is disposed on a side of the second touch metal layer away from the display layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate; the light-blocking color film layer is disposed on a side of the black matrix layer away from the display layer, the light-blocking color film layer comprises at least one light-blocking part, and one light-blocking part corresponds to one light-emitting part; and the protective layer is disposed on a side of the light-blocking color film layer away from the display layer.

[0015] In some embodiments, the optical functional layer further comprises a black matrix layer and a gray color film layer; the black matrix layer is disposed on a side of the second touch metal layer away from the display layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate; and the gray color film layer is disposed on a side of the black matrix layer away from the display layer, and the gray color film layer is configured to allow light of a corresponding color emitted by at least one light-emitting part to pass through.

[0016] In some embodiments, the second light-taking layer is further configured to comprise at least one light-blocking part, one light-blocking part corresponding to one light-emitting part; or, the second light-taking layer is further configured to allow light of a corresponding color emitted by at least one light-emitting part to pass through; the optical functional layer further comprises a black matrix layer and a protective layer; the black matrix layer is disposed on a side of the second touch metal layer away from the display layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate; and the protective layer is disposed on a side of the black matrix layer away from the display layer.

[0017] In some embodiments, the refractive index of the first light-taking layer is greater than the refractive index of the second light-taking layer.

[0018] In some embodiments, the refractive index of the first light-taking layer is greater than or equal to 1.5; and the refractive index of the second light-taking layer is less than or equal to 1.5.

[0019] In some embodiments, a cross section of the light-taking part of the first light-taking layer in a thickness direction of the touch display panel is trapezoidal.

[0020] In some embodiments, the display layer further comprises a pixel defining layer, the pixel defining layer comprises at least one opening, and one light-emitting part is located in one opening; a boundary of a projection of the light-taking part of the first light-taking layer on the pixel defining layer coincides with or has a gap with a lower boundary of the opening of the pixel defining layer, and the lower boundary of the opening of the pixel defining layer is a boundary of the opening close to the substrate.

[0021] In some embodiments, the thickness of the first light-taking layer is 1-5 um; the first light-taking layer is arranged between the first touch metal layer and the second touch metal layer, and the thickness of the part of the second light-taking layer above the corresponding light-taking portion is 1-4 um when the second light-taking layer covers the light-taking portion; the second light-taking layer is arranged between the first touch metal layer and the second touch metal layer, and the thickness of the part of the second light-taking layer above the corresponding light-taking portion is greater than 1 um when the second light-taking layer covers the light-taking portion.

[0022] In another aspect, a method for manufacturing a touch display panel is provided, including: forming a display layer, the display layer including a substrate and a light emitting layer away from the substrate, the light emitting layer including at least one light emitting portion; forming a first touch metal layer on a light emitting side of the display layer, the first touch metal layer including at least one first touch metal, a projection of the first touch metal on the substrate not overlapping with a projection of the light emitting portion on the substrate; forming a first light taking layer away from the first touch metal layer; forming a second touch metal layer on a side of the first light taking layer away from the display layer, the second touch metal layer including at least one second touch metal, the second touch metal and the first touch metal at least partially facing each other, a projection of the second touch metal on the substrate not overlapping with a projection of the light emitting portion on the substrate; the first light taking layer including a portion between the facing first touch metal and second touch metal; forming a second light taking layer away from the second touch metal layer. Or, forming a display layer, the display layer including a substrate and a light emitting layer away from the substrate, the light emitting layer including at least one light emitting portion; forming a first touch metal layer on a light emitting side of the display layer, the first touch metal layer including at least one first touch metal, a projection of the first touch metal on the substrate not overlapping with a projection of the light emitting portion on the substrate; forming a first light taking layer on the light emitting side of the display layer; forming a second light taking layer away from the first light taking layer; forming a second touch metal layer on a side of the second light taking layer away from the display layer, the second touch metal layer including at least one second touch metal, the second touch metal and the first touch metal at least partially facing each other, a projection of the second touch metal on the substrate not overlapping with a projection of the light emitting portion on the substrate; the second light taking layer including a portion between the facing first touch metal and second touch metal; or, forming a display layer, the display layer including a substrate and a light emitting layer away from the substrate, the light emitting layer including at least one light emitting portion; forming a first light taking layer on a light emitting side of the display layer; forming a first touch metal layer on the light emitting side of the display layer, the first touch metal layer including at least one first touch metal, a projection of the first touch metal on the substrate not overlapping with a projection of the light emitting portion on the substrate; forming a second light taking layer away from the first light taking layer; forming a second touch metal layer on a side of the second light taking layer away from the display layer, the second touch metal layer including at least one second touch metal, the second touch metal and the first touch metal at least partially facing each other, a projection of the second touch metal on the substrate not overlapping with a projection of the light emitting portion on the substrate; the second light taking layer including a portion between the facing first touch metal and second touch metal.

[0023] In another aspect, a display device is provided, including the touch display panel as described above. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings needed to be used in some embodiments of the present disclosure. Obviously, the drawings in the following description only represent some of the embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual time sequence, etc. of the product involved in the embodiments of the present disclosure.

[0025] FIG. 1 is a cross-sectional view of a touch display panel according to some embodiments;

[0026] FIG. 2A is a cross-sectional view of another touch display panel according to some embodiments;

[0027] FIG. 2B is a cross-sectional view of another touch display panel according to some embodiments;

[0028] FIG. 3 is a plan view of a touch display panel according to some embodiments;

[0029] FIG. 4 is a cross-sectional view of another touch display panel according to some embodiments;

[0030] FIG. 5 is a plan view of another touch display panel according to some embodiments;

[0031] FIG. 6 is a partial enlarged view of FIG. 5;

[0032] FIG. 7A is a cross-sectional view along the AA cross-sectional line in FIG. 6;

[0033] FIG. 7B is a cross-sectional view along the BB cross-sectional line in FIG. 6;

[0034] FIG. 8 is a plan view of another touch display panel according to some embodiments;

[0035] FIG. 9 is a cross-sectional view of another touch display panel according to some embodiments;

[0036] FIG. 10 is a cross-sectional view of another touch display panel according to some embodiments;

[0037] FIG. 11 is a cross-sectional view of another touch display panel according to some embodiments;

[0038] FIG. 12 is a transmittance plan view of a gray color film layer for different wavelengths of light according to some embodiments;

[0039] FIG. 13 is a cross-sectional view of another touch display panel according to some embodiments;

[0040] FIG. 14 is a cross-sectional view of another touch display panel according to some embodiments;

[0041] FIG. 15 is a cross-sectional view of yet another touch display panel, according to some embodiments;

[0042] FIG. 16 is a cross-sectional view of yet another touch display panel, according to some embodiments;

[0043] FIG. 17 is a cross-sectional view of yet another touch display panel, according to some embodiments;

[0044] FIG. 18 is a cross-sectional view of yet another touch display panel, according to some embodiments;

[0045] FIG. 19 is a fabrication step diagram of a touch display panel, according to some embodiments;

[0046] FIG. 20 is a fabrication step diagram of yet another touch display panel, according to some embodiments;

[0047] FIG. 21 is a fabrication step diagram of yet another touch display panel, according to some embodiments;

[0048] FIG. 22 is a plan view of a display device, according to some embodiments. DETAILED DESCRIPTION

[0049] The technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0050] Unless otherwise required by context, the term "comprise" and other forms of the term "comprise", such as "comprises" and "comprising", and the like, are used in an open, inclusive and non-limiting sense, that is, as "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to mean that a particular feature, structure, material or characteristic included in at least one embodiment or example of the present disclosure. The illustrative representation of the above terms does not necessarily mean the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0051] The terms "first", "second", etc. are used herein only to describe one ordinal number, and do not indicate or imply a relative importance or a specific order. Thus, a feature defined with "first", "second" may include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is two or more unless otherwise specified.

[0052] In describing some embodiments, "coupled" and "connected", and variations thereof, can be used. For example, these terms can be used to indicate that two or more components are in direct physical or electrical contact with each other. As used herein, coupled or connected can also mean that two or more components are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited in scope to the terms used herein.

[0053] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C", including the following combinations: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0054] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0055] As used herein, "parallel", "perpendicular", "equal" include the stated condition and conditions that are approximately the stated condition within an acceptable range of deviation, as determined by one of ordinary skill in the art taking into account the measurements being discussed and the error associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable range of deviation for approximately parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximately perpendicular, where the acceptable range of deviation for approximately perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable range of deviation for approximate equality can be, for example, a difference between the two that is less than or equal to 5% of either.

[0056] It should be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0057] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are schematic and are not intended to be drawn to scale. In the interest of clarity, not all of the individual features of actual implementations are shown in the drawings. Thus, the drawings represent examples of exemplary embodiments. The figures are not intended to be limiting in any way. For example, the shapes of the regions shown in the figures can typically vary when manufactured. It is intended that each feature discussed with reference to one or more figures be within the scope of the exemplary embodiments, and the illustrative figures are used to describe and explain exemplary embodiments. For the sake of brevity, the numerous details of the description or the like have not been shown in the drawings, and vice versa. In other instances, well-known structures and devices are shown in block diagram form.

[0058] With the development of display technology, display devices with touch display panels bring better user experience due to simple and convenient operation. However, as the functions integrated by the touch display panel are more and more, the power consumption of the touch display panel is also more and more large, in order to reduce the power consumption of the touch display panel, for example, COE (Color filter on Encapsulation, color filter layer on encapsulation layer) technology (polaroid removal technology) and / or EES (Efficiency Enhance Structure, light enhancement structure) technology can be used to prepare some film layers of the touch display panel, reduce the reflectivity of the touch display panel, and improve the light efficiency of the touch display panel.

[0059] At present, the COE (Color filter on Encapsulation, color filter layer on encapsulation layer) technology (polaroid removal technology) and / or EES (Efficiency Enhance Structure, light enhancement structure) technology can greatly improve the light efficiency of the touch display panel and effectively reduce the power consumption of the touch display panel.

[0060] Exemplarily, the COE technology uses a color filter layer to replace a polaroid, uses the color filter layer to realize the filtering effect of the touch display panel, improves the light efficiency of the touch display panel, and the color filter layer includes a black matrix layer, a photoresist color film layer, and a protective layer. The EES technology uses a light enhancement structure in a light enhancement layer to improve the light efficiency of the touch display panel, and the light enhancement layer includes a first light taking layer and a second light taking layer.

[0061] In some embodiments, as shown in FIG. 1, the touch display panel 100 comprises a display layer 10, a touch layer 20, and an optical functional layer 30 which are sequentially stacked; the display layer 10 comprises a substrate 11, a driving circuit layer 12, a light emitting device layer 13, and an encapsulation layer 14 which are sequentially stacked; the touch layer 20 comprises a touch buffer layer 21, a first touch metal layer 22, a touch insulating layer 23, and a second touch metal layer 24 which are sequentially stacked; and the optical functional layer 30 comprises a black matrix layer 321, a first light extraction layer 311, a second light extraction layer 312, a light blocking color film layer 322, and a protective layer 323 which are sequentially stacked.

[0062] However, the preparation process in the COE technology and the EES technology is a low-temperature process, i.e., prepared in a low-temperature environment. The black matrix layer 321, the light blocking color film layer 322, and the protective layer 323 in the COE technology and the first light extraction layer 311 and the second light extraction layer 312 in the EES technology all need a long time to be cured and form the required patterns, which reduces the production efficiency of the touch display panel 100 and seriously affects the production capacity of the touch display panel 100.

[0063] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some embodiments described above is as follows: sequentially forming the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the light blocking color film layer 322, and the protective layer 323, wherein forming the light blocking color film layer 322 comprises forming a red light blocking 322-1 / R, forming a green light blocking 322-1 / G, and forming a blue light blocking 322-1 / B, and the order of forming the red light blocking 322-1 / R, forming the green light blocking 322-1 / G, and forming the blue light blocking 322-1 / B is not limited in the present disclosure. Therefore, the preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 needs at least 11 processes, some of which involve patterning steps and need to use multiple mask plates. The preparation steps of the touch display panel 100 are more and the time consumption is longer, which seriously affects the production efficiency and the production capacity.

[0064] Some embodiments of the present disclosure provide a touch display panel 100, as shown in FIG. 2A and FIG. 2B, the touch display panel 100 includes a display layer 10, a touch layer 20, and an optical functional layer 30, the display layer 10 includes a substrate 11 and a light-emitting layer 133 away from the substrate 11, the light-emitting layer 133 includes at least one light-emitting part 133-1; the touch layer 20 is arranged on the light-emitting side of the display layer 10; the touch layer 20 includes a first touch metal layer 22 and a second touch metal layer 24 arranged away from the display layer 10 on the side of the first touch metal layer 22, the first touch metal layer 22 includes at least one first touch metal 22-1, the second touch metal layer 24 includes at least one second touch metal 24-1, the first touch metal 22-1 and the second touch metal 24-1 at least partially face each other, and the orthographic projection of the first touch metal 22-1 and the second touch metal 24-1 on the substrate 11 does not overlap with the orthographic projection of the light-emitting part 133-1 on the substrate 11; the optical functional layer 30 is arranged on the light-emitting side of the display layer 10; the optical functional layer 30 includes a first light extraction layer 311 and a second light extraction layer 312 arranged away from the display layer 10 on the side of the first light extraction layer 311; the first light extraction layer 311 is arranged between the first touch metal layer 22 and the second touch metal layer 24, and the first light extraction layer 311 includes a part located between the facing first touch metal 22-1 and the second touch metal 24-1; or, the second light extraction layer 312 is arranged between the first touch metal layer 22 and the second touch metal layer 24, and the second light extraction layer 312 includes a part located between the facing first touch metal 22-1 and the second touch metal 24-1.

[0065] Exemplarily, the touch display panel 100 can be an organic light-emitting diode (OLED) touch display panel, a quantum dot light emitting diode (QLED) touch display panel, or a micro light emitting diode (MLED) touch display panel, etc.; the embodiments of the present disclosure are illustratively described taking an OLED touch display panel as an example, but the embodiments of the present disclosure are not limited thereto.

[0066] OLED is a current type of organic light emitting device, which is a phenomenon of light emission by injection and recombination of carriers, and the light emission intensity is proportional to the injected current. Under the action of an electric field, holes generated at the anode and electrons generated at the cathode will move to the light emitting layer 133. When the two meet in the light emitting layer 133, energy excitons are generated, thereby exciting light emitting molecules to finally produce visible light. Light emitting molecules produce red, green and blue three primary colors (RGB three primary colors) depending on their formula, which constitute the basic colors. OLED touch display panel has the advantages of high brightness, high efficiency, wide viewing angle, self-luminous, full solid, ultra-thin and ultra-light, simple manufacturing process, fast response speed, full-color display and good mechanical processing performance, etc. Therefore, it has been more and more widely used in mobile phones, tablets, computers, televisions and various display devices.

[0067] Exemplarily, as shown in FIG. 3, the touch display panel 100 includes a display area AA and a frame area BB. The display area AA is used for displaying images, and the frame area BB is used for setting signal lines and the like. A plurality of sub-pixels P are arranged in the display area AA of the touch display panel 100, and the plurality of sub-pixels P are arranged in an array, for example, a rectangular array, in the display area AA. Each sub-pixel P can display a single color. For example, the plurality of sub-pixels P include first color sub-pixels, second color sub-pixels and third color sub-pixels, which display red, green or blue respectively. By adjusting the brightness (gray scale) of different color sub-pixels P, a variety of colors can be displayed through color combination and superposition, thereby realizing full-color display of the touch display panel 100.

[0068] Exemplarily, as shown in FIGS. 2A and 2B, the touch display panel 100 includes a display layer 10 and a touch layer 20 (touch sensor panel, referred to as TSP). The display layer 10 is used for displaying images, and the touch layer 20 can realize touch operation on the display layer 10. The touch layer 20 is arranged on the light emitting side of the display layer 10 to facilitate touch operation.

[0069] Exemplarily, as shown in FIG. 3, the display layer 10 of the touch display panel 100 includes a plurality of sub-pixels P, and the sub-pixel P is the smallest unit for picture display of the display layer 10. Each sub-pixel P includes a light emitting device E and a pixel driving circuit D for controlling the light emitting device E to emit light. That is, one sub-pixel P corresponds to one light emitting device E and one pixel driving circuit D. The plurality of sub-pixels P are arranged according to a specified rule in the display area AA. Exemplarily, the plurality of sub-pixels P are arranged in multiple rows and multiple columns. Since each sub-pixel P corresponds to one pixel driving circuit D, the pixel driving circuit D is also arranged in multiple rows and multiple columns.

[0070] Exemplarily, the light emitting device E can emit light rays, for example, the light emitting device E can emit one of red light rays, green light rays, blue light rays or white light rays. By emitting light rays through the plurality of light emitting devices E arranged in the display area AA, the part of the display layer 10 located in the display area AA can display an image. The light emitting device E includes but is not limited to one of OLED, QLED, Mini LED, Micro LED, LED, etc.

[0071] Exemplarily, the pixel driving circuit D can be configured to provide an electrical signal (for example, a driving voltage or a driving current) to the light emitting device E coupled with the pixel driving circuit D in response to the received scanning signal and data signal (for example, the scanning signal output by the scanning driving circuit and the data signal output by the data driving circuit) to drive the light emitting device E to emit light, so that the display layer 10 can display an image. The pixel driving circuit D can include a plurality of transistors and at least one (for example, one; or, for example, a plurality) of capacitors. For example, the pixel driving circuit D can be of a structure of “2T1C”, “6T1C”, “7T1C”, “6T2C” or “7T2C”, etc. Here, “T” represents a transistor, for example, a thin film transistor. The number before “T” represents the number of transistors. “C” represents a capacitor, and the number before “C” represents the number of capacitors.

[0072] Exemplarily, in each sub-pixel P, the light emitting device E is electrically connected with the corresponding pixel driving circuit D, specifically, the anode of the light emitting device E is electrically connected with the corresponding pixel driving circuit D, so that the anode voltage input into the inside of the display layer 10 is transmitted to the anode of the light emitting device E through the pixel driving circuit D, and at the same time, the cathode voltage is transmitted to the cathode of the light emitting device E, so that an electric field is formed between the anode and the cathode to drive the light emitting device E to emit light rays.

[0073] Exemplarily, as shown in FIG. 4, the display layer 10 of the touch display panel 100 includes a substrate 11, a driving circuit layer 12, a light emitting device layer 13 and an encapsulation layer 14 which are sequentially stacked, and the substrate 11 supports other structures in the display layer 10. The substrate 11 can be a flexible substrate, and the material of the flexible substrate can be Polyethylene terephthalate (PET), Polyethylene naphthalate two formic acid glycol ester (PEN), ultra-thin glass or Polyimide (PI), etc. The substrate 11 can also be a rigid substrate, and the material of the rigid substrate can be glass or PMMA (Polymethyl methacrylate), etc.

[0074] Exemplarily, the driving circuit layer 12 is configured to form a plurality of pixel driving circuits D and a plurality of signal lines for driving the pixel driving circuits D. As shown in FIG. 4, the driving circuit layer 12 can include a plurality of conductive layers, which can include, for example, a semiconductor layer 121, a gate conductive layer 123, a first source-drain conductive layer 125, and a second source-drain conductive layer 128 arranged in sequence in a direction perpendicular to and away from the substrate 11. Of course, the driving circuit layer 12 can also include other conductive layers, such as a third source-drain conductive layer, which is not limited here.

[0075] Exemplarily, as shown in FIG. 4, the plurality of conductive layers form a plurality of transistors TFT, which can include a semiconductor pattern T11 located in the semiconductor layer 121, a gate pattern T12 located in the gate conductive layer 123, and a source pattern T13 and a drain pattern T14 located in the first source-drain conductive layer 125.

[0076] Exemplarily, the driving circuit layer 12 can also include an insulating layer located between adjacent conductive layers, which is used to isolate adjacent conductive layers. For example, as shown in FIG. 4, the driving circuit layer 12 can include a gate insulating layer 122 located between the semiconductor layer 121 and the gate conductive layer 123, an interlayer dielectric layer 124 located between the gate conductive layer 123 and the first source-drain conductive layer 125, and a passivation layer 126 and a first planarization layer 127 located between the first source-drain conductive layer 125 and the second source-drain conductive layer 128, and a second planarization layer 129 located between the second source-drain conductive layer 128 and the light emitting device layer 13. Of course, the driving circuit layer 12 can also include other insulating film layers, which are not described one by one here.

[0077] Exemplarily, the light emitting device layer 13 is configured to form a plurality of light emitting devices E. As shown in FIG. 4, the light emitting device layer 13 includes a first electrode layer 131, a pixel defining layer 132, a light emitting layer 133, and a second electrode layer 134 arranged in sequence in a direction away from the substrate 11. The first electrode layer 131 includes a plurality of first electrodes 131-1, the light emitting layer 133 includes a plurality of light emitting portions 133-1, the pixel defining layer 132 includes a plurality of openings 132-1, one opening 132-1 exposes at least part of one first electrode 131-1, at least part of one light emitting portion 133-1 is located within one opening 132-1, and the second electrode layer 134 is laid in whole. One light emitting device E includes one first electrode 131-1, one light emitting portion 133-1, and a second electrode; one light emitting device E is connected with one pixel driving circuit D.

[0078] Exemplarily, the first electrode layer 131 can be formed of a conductive material with a high work function, and can include indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), gallium zinc oxide (GZO), zinc oxide (ZnO), indium oxide (In2O3), aluminum zinc oxide (AZO), carbon nanotubes, etc. The first electrode layer 131 can include only one layer of conductive material, or can include multiple layers of conductive material, for example, the first electrode layer 131 includes three layers of conductive material, which are indium tin oxide, silver, and indium tin oxide, respectively. The second electrode layer 134 can be formed of a material with high conductivity and low work function, for example, can include alloys such as magnesium aluminum alloy (MgAl) and lithium aluminum alloy (LiAl), or elemental metals such as magnesium (Mg), aluminum (Al), lithium (Li), and silver.

[0079] Exemplarily, the material of the light-emitting layer 133 can include low-molecular-weight organic materials or polymer materials, which are fluorescent or phosphorescent materials capable of emitting red light, green light, blue light, or white light under the action of an electric field. In order to improve the light-emitting efficiency of the light-emitting device E in the display layer 10, the light-emitting device layer 13 can further include one or more of an election transporting layer (ETL), an election injection layer (EIL), a hole transporting layer (HTL), and a hole injection layer (HIL).

[0080] Exemplarily, as shown in FIG. 4, the encapsulation layer 14 is located on the side of the light-emitting device layer 13 away from the substrate 11. The encapsulation layer 14 can include a first inorganic encapsulation layer 141, an organic encapsulation layer 142, and a second inorganic encapsulation layer 143. The first inorganic encapsulation layer 141 and the second inorganic encapsulation layer 143 can be formed by a plasma chemical vapor deposition process, and the organic encapsulation layer 142 can be formed by an inkjet printing process. The encapsulation layer 14 is used to encapsulate the display layer 10 to prevent water and oxygen in the environment from entering the display layer 10.

[0081] Exemplarily, the touch layer 20 of the touch display panel 100 can be formed by a flexible multi-layer on cell (FMLOC) process, and generally includes multiple film layer structures.

[0082] Exemplarily, as shown in FIG. 5, the touch layer 20 of the touch display panel 100 can include a plurality of first touch units 201 and a plurality of second touch units 202. The first touch units 201 extend along a first direction X, the second touch units 202 extend along a second direction Y, the first touch units 201 are insulated from the second touch units 202, and the first direction X intersects the second direction Y, for example, the first direction X is perpendicular to the second direction Y.

[0083] Exemplarily, as shown in FIG. 5, and with reference to FIG. 6, the first touch unit 201 can include a plurality of first touch electrodes 2011 and a plurality of first connecting portions 2012, each of the first connecting portions 2012 electrically connects two adjacent first touch electrodes 2011. The second touch unit 202 includes a plurality of second touch electrodes 2021 and a plurality of second connecting portions 2022, each of the second connecting portions 2022 electrically connects two adjacent second touch electrodes 2021, and the first connecting portions 2012 are insulated from the second connecting portions 2022. Mutual capacitance can be generated between adjacent first touch electrodes 2011 and second touch electrodes 2021. After the touch display panel 100 is touched, the mutual capacitance value between adjacent first touch electrodes 2011 and second touch electrodes 2021 changes, so that the touch position can be determined by detecting the change amount of the mutual capacitance value.

[0084] In some embodiments, as shown in FIGS. 7A and 7B, and with reference to FIG. 1, the touch layer 20 can include a touch buffer layer 21, a first touch metal layer 22, a touch insulating layer 23, and a second touch metal layer 24 which are sequentially stacked. The first touch electrodes 2011, the second touch electrodes 2021, and the first connecting portions 2012 can be disposed on the first touch metal layer 22, and the second connecting portions 2022 can be disposed on the second touch metal layer 24; or the second connecting portions 2022 can be disposed on the first touch metal layer 22, and the first touch electrodes 2011, the second touch electrodes 2021, and the first connecting portions 2012 can be disposed on the second touch metal layer 24; or the first touch electrodes 2011 and the first connecting portions 2012 can be disposed on the first touch metal layer 22, and the second touch electrodes 2021 and the second connecting portions 2022 can be disposed on the second touch metal layer 24; or the second touch electrodes 2021 and the second connecting portions 2022 can be disposed on the first touch metal layer 22, and the first touch electrodes 2011 and the first connecting portions 2012 can be disposed on the second touch metal layer 24, which are not limited in the present disclosure. The present disclosure is described by taking the second connecting portions 2022 disposed on the first touch metal layer 22 and the first touch electrodes 2011, the second touch electrodes 2021, and the first connecting portions 2012 disposed on the second touch metal layer 24.

[0085] Exemplarily, as shown in FIG. 8, and with reference to FIG. 5, the first touch electrode 2011 or the second touch electrode 2021 of the touch layer 20 in the touch display panel 100 can each include a plurality of connected touch metal lines 20-1, the plurality of touch metal lines 20-1 in the first touch electrode 2011 are in whole communication, the plurality of touch metal lines 20-1 in the second touch electrode 2021 are in whole communication, the plurality of touch metal lines 20-1 in the first touch electrode 2011 are not connected with the plurality of touch metal lines 20-1 in the second touch electrode 2021, so that the first touch electrode 2011 and the second touch electrode 2021 are insulated from each other. The orthographic projection of the plurality of touch metal lines 20-1 in the first touch electrode 2011 or the second touch electrode 2021 on the light emitting layer 133 is located between the light emitting parts 133-1 of two adjacent sub-pixels P and connected with each other. It can be understood that the plurality of touch metal lines 20-1, for example, four touch metal lines 20-1, surround the light emitting part 133-1 of one sub-pixel P.

[0086] Exemplarily, the plurality of touch metal lines 20-1 of the first touch electrode 2011, the plurality of touch metal lines 20-1 of the second touch electrode 2021 and the first connecting part 2012 located in the first touch metal layer 22 are the first touch metal 22-1, the second connecting part 2022 located in the second touch metal layer 24 is the second touch metal 24-1, the first touch metal 22-1 and the second touch metal 24-1 at least partially face each other, for example, the first connecting part 2012 located in the first touch metal layer 22 partially faces the second connecting part 2022 located in the second touch metal layer 24. The orthographic projection of the plurality of touch metal lines 20-1 in the first touch electrode 2011 or the second touch electrode 2021 on the light emitting layer 133 is located between the light emitting parts 133-1 of two adjacent sub-pixels P, that is, the orthographic projection of the first touch metal 22-1 and the second touch metal 24-1 on the substrate 11 does not overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11.

[0087] Exemplarily, as shown in FIG. 2A and FIG. 2B, the optical functional layer 30 of the touch display panel 100 includes a light enhancement layer 31, and the light enhancement layer 31 includes a first light extraction layer 311 and a second light extraction layer 312. The first light extraction layer 311 and the second light extraction layer 312 can be organic materials, and the refractive indexes of the first light extraction layer 311 and the second light extraction layer 312 are different. For example, in some embodiments, the refractive index of the first light extraction layer 311 is greater than or equal to 1.5, and the refractive index of the second light extraction layer 312 is less than or equal to 1.5. Specifically, the refractive index of the first light extraction layer 311 can be in a range of 1.5 to 1.9, and the refractive index of the second light extraction layer 312 can be in a range of 1.4 to 1.5. It can be understood that when the refractive index of the first light extraction layer 311 is 1.5, the refractive index of the second light extraction layer 312 is less than 1.5, so that the refractive indexes of the first light extraction layer 311 and the second light extraction layer 312 are different. When the refractive index of the second light extraction layer 312 is 1.5, the refractive index of the first light extraction layer 311 is greater than 1.5, so that the refractive indexes of the first light extraction layer 311 and the second light extraction layer 312 are different. In other embodiments, the refractive index of the first light extraction layer 311 is greater than 1.6, and the refractive index of the second light extraction layer 312 is less than 1.5, which is not limited in the present disclosure, and the function of the light enhancement layer 31 can be achieved.

[0088] As shown in FIG. 2A and FIG. 2B, the light emitting device E in the touch display panel 100 emits light, and part of the light is incident on the first touch metal layer 22 or the second touch metal layer 24. Since the first touch metal layer 22 or the second touch metal layer 24 is not transparent to light, the part of the light is blocked, which reduces the light emission efficiency of the touch display panel 100. The first light extraction layer 311 of the light enhancement layer 31 includes at least one light extraction portion 311-1, for example. The cross section of the light extraction portion 311-1 along the thickness direction of the touch display panel 100 is trapezoidal, for example. The second light extraction layer 312 covers the light extraction portion 311-1. The position where the light extraction portion 311-1 contacts the second light extraction layer 312 is a bevel and forms a stack with refractive index difference. Part of the light that is originally emitted at a large viewing angle and is blocked by the first touch metal layer 22 or the second touch metal layer 24 can pass through the stack with refractive index difference. After passing through the stack with refractive index difference, the part of the light is refracted, so that the part of the light changes the emission angle and is not blocked by the first touch metal layer 22 or the second touch metal layer 24. Therefore, the part of the light can be emitted out of the touch display panel 100, thereby improving the light emission efficiency of the touch display panel 100.

[0089] Exemplarily, as shown in FIG. 2A, the first light extraction layer 311 is arranged between the first touch metal layer 22 and the second touch metal layer 24, and the first light extraction layer 311 includes a portion between the first touch metal 22-1 and the second touch metal 24-1 that are opposite to each other; that is, the first light extraction layer 311 is used to insulate the first touch metal 22-1 and the second touch metal 24-1 that are opposite to each other, multiplexing of the first light extraction layer 311 is achieved, the first light extraction layer 311 can not only insulate the first touch metal 22-1 and the second touch metal 24-1 that are opposite to each other, but also can realize the function of the light enhancement layer 31 to improve the light extraction efficiency; multiplexing of the first light extraction layer 311 makes it unnecessary to separately arrange the touch insulating layer 23 for isolating the first touch metal layer 22 and the second touch metal layer 24 when the touch display panel 100 is prepared, the first light extraction layer 311 is used to replace the touch insulating layer 23, the process of preparing the touch insulating layer 23 is saved, and the mask plate required for preparing the touch insulating layer 23 is saved, not only the light extraction efficiency of the touch display panel 100 is improved, and the power consumption of the touch display panel 100 is reduced, but also the preparation process flow of the touch display panel 100 is reduced, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is also reduced, the thin design of the touch display panel 100 is realized.

[0090] It should be noted that the "opposite" described in the disclosure refers to the orthographic projection of the first touch metal 22-1 on the substrate 11, which overlaps with the orthographic projection of the second touch metal 24-1 on the substrate 11.

[0091] Exemplarily, as shown in FIG. 2B, the second light extraction layer 312 is arranged between the first touch metal layer 22 and the second touch metal layer 24, and the second light extraction layer 312 includes a portion located between the first touch metal 22-1 and the second touch metal 24-1 opposite to each other; that is, the second light extraction layer 312 is used to insulate the first touch metal 22-1 and the second touch metal 24-1 opposite to each other, so as to realize multiplexing of the second light extraction layer 312. The second light extraction layer 312 can not only insulate the first touch metal 22-1 and the second touch metal 24-1 opposite to each other, but also realize the function of the light enhancement layer 31 to improve the light extraction efficiency. Multiplexing of the second light extraction layer 312 makes it unnecessary to separately arrange the touch insulating layer 23 for insulating the first touch metal layer 22 and the second touch metal layer 24 when the touch display panel 100 is prepared, and the second light extraction layer 312 is used to replace the touch insulating layer 23, thereby saving the process of preparing the touch insulating layer 23 and the mask plate required for preparing the touch insulating layer 23. Not only the light extraction efficiency of the touch display panel 100 is improved, and the power consumption of the touch display panel 100 is reduced, but also the preparation process flow of the touch display panel 100 is reduced, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is reduced, so as to realize the thin design of the touch display panel 100.

[0092] In some embodiments, as shown in FIG. 2A, the first light extraction layer 311 is arranged between the first touch metal layer 22 and the second touch metal layer 24, the first light extraction layer 311 includes at least one light extraction portion 311-1 and an isolation portion 311-2, one light extraction portion 311-1 corresponds to one light emitting portion 133-1, and the isolation portion 311-2 is located between the first touch metal 22-1 and the second touch metal 24-1 opposite to each other; the at least one light extraction portion 311-1 and the isolation portion 311-2 are arranged in a spaced manner; the second light extraction layer 312 is arranged on a side of the second touch metal layer 24 away from the display layer 10, and the second light extraction layer 312 at least covers the side surface of the light extraction portion 311-1, for example, the second light extraction layer 312 completely covers the light extraction portion 311-1.

[0093] It should be noted that the "one light taking portion 311-1 corresponds to one light emitting portion 133-1" described in the present disclosure means that the orthographic projection of the light taking portion 311-1 on the substrate 11 at least partially overlaps with the orthographic projection of the light emitting portion 133-1 on the substrate 11. For example, the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 overlaps with the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11; for another example, the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 is located within the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11; for another example, the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 is located outside the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11; for another example, part of the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 is located within the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11, and the like, which are not limited by the present disclosure.

[0094] Exemplarily, when the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 is located within the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11, that is, the light taking portion 311-1 is inwardly retracted relative to the light emitting portion 133-1, for example, the distance between the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 and the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11 is 0 um to 1.5 um; when the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 is located outside the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11, that is, the light taking portion 311-1 is outwardly expanded relative to the light emitting portion 133-1, for example, the distance between the boundary of the orthographic projection of the light taking portion 311-1 on the substrate 11 and the boundary of the orthographic projection of the light emitting portion 133-1 on the substrate 11 is 0 um to 1.5 um; the relative positions of the light taking portion 311-1 and the light emitting portion 133-1 and the related dimensions can be set according to actual processes, and the schemes described in the present disclosure are only schemes in some embodiments, which do not limit the protection scope.

[0095] It should be noted that the "cladding" described in the present disclosure means that the pattern of a certain layer covers the side surface and the upper surface of the pattern of the underlying layer.

[0096] In some embodiments, the light emitting device layer 13 includes a plurality of light emitting portions 133-1, and correspondingly, the first light taking layer 311 includes a plurality of light taking portions 311-1, the orthographic projection of the light taking portions 311-1 on the substrate 11 covers the orthographic projection of the light emitting portions 133-1 on the substrate 11, so as to ensure that as much as possible of the light emitted by the light emitting portions 133-1 that would be blocked by the first touch metal layer 22 or the second touch metal layer 24 due to large viewing angles can pass through the side surface of the corresponding light taking portion 311-1, so as to avoid the light emitted by the light emitting portions 133-1 that would be blocked by the first touch metal layer 22 or the second touch metal layer 24 due to large viewing angles from being incident on the first touch metal layer 22 or the second touch metal layer 24, so as to better realize the light emitted by the light emitting device E to be converged; and the light emitted by the light emitting portions 133-1 that would be blocked by the first touch metal layer 22 or the second touch metal layer 24 due to large viewing angles can be emitted through the side surface of the light taking portion 311-1. The isolation portions 311-2 are arranged in a spaced manner with the light taking portions 311-1, and the isolation portions 311-2 are arranged opposite to the pixel defining layer 132, for example.

[0097] It should be noted that the orthographic projection of the light taking portions 311-1 on the substrate 11 covering the orthographic projection of the light emitting portions 133-1 on the substrate 11 means that the boundary of the orthographic projection of the light taking portions 311-1 on the substrate 11 overlaps with the boundary of the orthographic projection of the light emitting portions 133-1 on the substrate 11, or the boundary of the orthographic projection of the light taking portions 311-1 on the substrate 11 is located outside the boundary of the orthographic projection of the light emitting portions 133-1 on the substrate 11.

[0098] Exemplarily, the second light taking layer 312 is arranged in an integral manner, so as to ensure the flatness of the second light taking layer 312, and facilitate the preparation of subsequent film layers. The second light taking layer 312 covers at least one light taking portion 311-1, and is located on the side of the light taking portion 311-1 and the isolation portion 311-2 away from the substrate, and fills the gap between the light taking portion 311-1 and the isolation portion 311-2. The first light taking layer 311 and the second light taking layer 312 form a boundary surface with different refractive indexes at the side surface of the light taking portion 311-1. When the light emitted by the light taking portion 311-1 is incident on the second light taking layer 312, the light is refracted when passing through the boundary surface. The light taking portion 311-1 is used to cooperate with the second light taking layer 312, so as to realize the function of the light enhancement layer 31 to improve the light emitting efficiency.

[0099] Specifically, the light emitting device E in the touch display panel 100 emits light, and part of the light is incident on the first touch metal layer 22 or the second touch metal layer 24. Since the first touch metal layer 22 or the second touch metal layer 24 is not transparent to light, the part of the light is blocked, reducing the light extraction efficiency of the touch display panel 100. The light extraction part 311-1 of the first light extraction layer 311 has a cross section along the thickness direction of the touch display panel 100, for example, a trapezoidal shape. The second light extraction layer 312 covers the light extraction part 311-1. The position where the light extraction part 311-1 contacts the second light extraction layer 312 is a bevel and forms a stack with a refractive index difference. Part of the light that is originally emitted at a large viewing angle and is blocked by the first touch metal layer 22 or the second touch metal layer 24 passes through the stack with a refractive index difference. After passing through the stack with a refractive index difference, the part of the light is refracted, so that the part of the light changes the emission angle and is not blocked by the first touch metal layer 22 or the second touch metal layer 24. This part of the light can be emitted out of the touch display panel 100, thereby improving the light extraction efficiency of the touch display panel 100. The isolation part 311-2 is located between the opposite first touch metal 22-1 and the second touch metal 24-1, and is used to insulate the opposite first touch metal 22-1 and the second touch metal 24-1, preventing the first touch metal 22-1 and the second touch metal 24-1 from being conductive, and affecting the touch function of the touch display panel 100.

[0100] In some embodiments, as shown in FIG. 9, the optical functional layer 30 further includes a black matrix layer 321, a light-blocking color film layer 322, and a protective layer 323. The black matrix layer 321 is disposed between the second light extraction layer 312 and the second touch metal layer 24. The black matrix layer 321 includes at least one black matrix 321-1, and the orthogonal projection of the black matrix 321-1 on the substrate 11 does not overlap with the orthogonal projection of the light emitting part 133-1 on the substrate 11. The light-blocking color film layer 322 is disposed on the side of the second light extraction layer 312 away from the display layer 10. The light-blocking color film layer 322 includes at least one light-blocking part 322-1, and one light-blocking part 322-1 corresponds to one light emitting part 133-1. The protective layer 323 is disposed on the side of the light-blocking color film layer 322 away from the display layer 10.

[0101] For example, the COE technology is to dispose a color filter layer 32 on the light emitting side of the display layer 10 of the touch display panel 100, and to integrally manufacture the color filter layer 32 and the display layer 10, instead of a polarizing plate. The COE technology not only can realize the light filtering effect of the touch display panel 100, but also can reduce the light reflectivity of the touch display panel 100, improve the light extraction efficiency of the touch display panel 100, and reduce the power consumption of the touch display panel 100. In addition, the COE technology can significantly reduce the thickness of the display product, and meet the thinness requirement of the display product.

[0102] Exemplarily, as shown in FIG. 10, the color filter layer 32 includes a black matrix layer 321, a photoresist color film layer 322, and a protective layer 323; the photoresist color film layer 322 can be an organic material, and the photoresist color film layer 322 includes at least one photoresist 322-1, for example, can include a plurality of red photoresists 322-1 / R, a plurality of green photoresists 322-1 / G, and a plurality of blue photoresists 322-1 / B, and there can be a gap between any two adjacent photoresists 322-1, and / or there can be an overlapping part between any two adjacent photoresists 322-1, so that the surface of the photoresist color film layer 322 is uneven, and the protective layer 323 can be arranged above the photoresist color film layer 322 to protect the photoresist color film layer 322 and improve the flatness of the photoresist color film layer 322.

[0103] The light emitting part 133-1 can include a plurality of red light emitting parts 133-1 / R, a plurality of green light emitting parts 133-1 / G, and a plurality of blue light emitting parts 133-1 / B, one red photoresist 322-1 / R corresponds to one red light emitting part 133-1 / R, one green photoresist 322-1 / G corresponds to one green light emitting part 133-1 / G, and one blue photoresist 322-1 / B corresponds to one blue light emitting part 133-1 / B; the red photoresist 322-1 / R can make the red light emitted by the red light emitting part 133-1 / R normally transmit, for example, can make the red light in the wave band of 610 nm-650 nm transmit, and absorb the green light emitted by the green light emitting part 133-1 / G and the blue light emitted by the blue light emitting part 133-1 / B; the green photoresist 322-1 / G can make the green light emitted by the green light emitting part 133-1 / G normally transmit, for example, can make the green light in the wave band of 515 nm-565 nm transmit, and absorb the red light emitted by the red light emitting part 133-1 / R and the blue light emitted by the blue light emitting part 133-1 / B; and the blue photoresist 322-1 / B can make the blue light emitted by the blue light emitting part 133-1 / B normally transmit, for example, can make the blue light in the wave band of 450 nm-480 nm transmit, and absorb the red light emitted by the red light emitting part 133-1 / R and the green light emitted by the green light emitting part 133-1 / G.

[0104] Exemplarily, as shown in FIG. 10, the material of the black matrix layer 321 can be an organic black dye, the black matrix layer 321 includes at least one black matrix 321-1, for example, includes a plurality of black matrices 321-1, the orthographic projection of the black matrix 321-1 on the substrate 11 has no overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11, that is, in the plane where the touch display panel 100 is located, the orthographic projection of the plurality of black matrices 321-1 on the substrate 11 is located in the interval area of the orthographic projection of the plurality of light emitting parts 133-1 on the substrate 11, so as to expose the plurality of light emitting parts 133-1, so that the light emitted by the plurality of light emitting parts 133-1 can not be blocked. The black matrix layer 321 is arranged in layers with the color resist film layer 322, the black matrix 321-1 is located on the side of the color resist film layer 322 close to the display layer 10, which can improve the exit angle of the light emitted by the light emitting part 133-1, increase the light extraction efficiency of the touch display panel 100.

[0105] Exemplarily, the protective layer 323 can be an organic material, the protective layer 323 is used to protect the color resist film layer 322 from being contaminated; and since the color resist film layer 322 is composed of a plurality of color resist layers 322-1 of different colors, at the position where two adjacent color resist layers 322-1 contact, there can be a situation that two color resist layers 322-1 overlap and protrude or do not contact and recess. The surface of the color resist film layer 322 is uneven and not flat, therefore, the protective layer 323 can also increase the flatness of the surface of the color resist film layer 322.

[0106] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some of the above embodiments is as follows: sequentially forming the touch buffer layer 21, the first touch metal layer 22, the first light taking layer 311, the second touch metal layer 24, the black matrix layer 321, the second light taking layer 312, the color resist film layer 322 and the protective layer 323, wherein forming the color resist film layer 322 includes forming the red color resist layer 322-1 / R, forming the green color resist layer 322-1 / G and forming the blue color resist layer 322-1 / B, and the order of forming the red color resist layer 322-1 / R, forming the green color resist layer 322-1 / G and forming the blue color resist layer 322-1 / B is not limited in the present disclosure, therefore, the preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 needs at least 10 processes, compared with sequentially forming the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light taking layer 311, the second light taking layer 312, the color resist film layer 322 and the protective layer 323, 1 process is saved, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is also reduced, realizing the thin design of the touch display panel 100.

[0107] In some embodiments, as shown in FIG. 11, the optical functional layer 30 further comprises a black matrix layer 321 and a gray color film layer 324. The black matrix layer 321 is arranged between the second light taking layer 312 and the second touch metal layer 24. The black matrix layer 321 comprises at least one black matrix 321-1, and the orthographic projection of the black matrix 321-1 on the substrate 11 does not overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11. The gray color film layer 324 is arranged on the side of the second light taking layer 312 away from the display layer 10. The gray color film layer 324 is configured to allow light of corresponding colors emitted by all the light emitting parts 133-1 to pass through.

[0108] For example, the gray color film layer 324 can be an organic material. The gray color film layer 324 is an integrated structure and can simultaneously transmit red light, green light and blue light. The transmittance of the gray color film layer 324 to light of different wavelengths is shown in FIG. 12. For example, the gray color film layer 324 can simultaneously transmit red light of a wavelength of 610 nm-650 nm, green light of a wavelength of 515 nm-565 nm and blue light of a wavelength of 450 nm-480 nm.

[0109] For example, the photoresist color film layer 322 comprises a red photoresist 322-1 / R, a green photoresist 322-1 / G and a blue photoresist 322-1 / B. When the photoresist color film layer 322 is prepared, three processes are required. The surface of the gray color film layer 324 is flat and is an integrated structure, which can be prepared by only one process. In addition, the gray color film layer 324 does not need to be protected by a separate protective layer 323 or increase the flatness of the surface. Therefore, the use of the gray color film layer 324 instead of the two-layer structure of the photoresist color film layer 322 and the protective layer 323 saves three processes and mask plates for preparing different color photoresists 322-1 and protective layers 323 when the touch display panel 100 is prepared.

[0110] For example, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some embodiments described above comprises sequentially forming a touch buffer layer 21, a first touch metal layer 22, a first light taking layer 311, a second touch metal layer 24, a black matrix layer 321, a second light taking layer 312 and a gray color film layer 324. The preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 requires at least 7 processes. Compared with sequentially forming a touch buffer layer 21, a first touch metal layer 22, a touch insulating layer 23, a second touch metal layer 24, a black matrix layer 321, a first light taking layer 311, a second light taking layer 312, a photoresist color film layer 322 and a protective layer 323, 4 processes are saved, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is also reduced, thereby realizing the thin design of the touch display panel 100.

[0111] It can be understood that, in order to further protect the gray color film layer 324, a protective layer 323 can be arranged above the gray color film layer 324, and the present disclosure is not limited thereto.

[0112] In some embodiments, as shown in FIG. 13, the second light extraction layer 312 is further configured to include at least one light blocking 312-1, one light blocking 312-1 corresponding to one light emitting part 133-1; the optical functional layer 30 further includes a black matrix layer 321 and a protective layer 323; the black matrix layer 321 is arranged between the second light extraction layer 312 and the second touch metal layer 24, and the black matrix layer 321 includes at least one black matrix 321-1, and the orthographic projection of the black matrix 321-1 on the substrate 11 does not overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11; the protective layer 323 is arranged on the side of the second light extraction layer 312 away from the display layer 10.

[0113] Exemplarily, the second light extraction layer 312 can also be multiplexed as a light blocking color film layer 322, that is, the second light extraction layer 312 includes at least one light blocking 312-1, for example, can include a plurality of red light blocks, a plurality of green light blocks and a plurality of blue light blocks, and there can be a gap between adjacent two light blocks 312-1 of the second light extraction layer 312, and / or there can be an overlapping part between adjacent two light blocks 312-1, therefore, the surface of the second light extraction layer 312 will appear uneven, and the protective layer 323 can be arranged above the second light extraction layer 312 to protect the second light extraction layer 312 and improve the flatness of the second light extraction layer 312. The light emitting part 133-1 can include a plurality of red light emitting parts 133-1 / R, a plurality of green light emitting parts 133-1 / G and a plurality of blue light emitting parts 133-1 / B, one red light block corresponding to one red light emitting part 133-1 / R, one green light block corresponding to one green light emitting part 133-1 / G, and one blue light block corresponding to one blue light emitting part 133-1 / B; the red light block can make the red light emitted by the red light emitting part 133-1 / R normally transmit, for example, can make the red light in the wave band of 610nm-650nm transmit, while absorbing the green light emitted by the green light emitting part and the blue light emitted by the blue light emitting part; the green light block can make the green light emitted by the green light emitting part 133-1 / G normally transmit, for example, can make the green light in the wave band of 515nm-565nm transmit, while absorbing the red light emitted by the red light emitting part and the blue light emitted by the blue light emitting part; the blue light block can make the blue light emitted by the blue light emitting part 133-1 / B normally transmit, for example, can make the blue light in the wave band of 450nm-480nm transmit, while absorbing the red light emitted by the red light emitting part and the green light emitted by the green light emitting part.

[0114] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some of the above embodiments is as follows: the touch buffer layer 21, the first touch metal layer 22, the first light extraction layer 311, the second touch metal layer 24, the black matrix layer 321, the second light extraction layer 312, and the protective layer 323 are sequentially formed, wherein the formation of the second light extraction layer 312 includes the formation of the red photoresist, the formation of the green photoresist, and the formation of the blue photoresist. The order of the formation of the red photoresist, the formation of the green photoresist, and the formation of the blue photoresist is not limited in the present disclosure. Therefore, the preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 needs at least 9 processes, which saves 2 processes compared with the sequential formation of the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the photoresist color film layer 322, and the protective layer 323, saves the preparation time, improves the production efficiency, improves the production capacity, and also reduces the thickness of the touch display panel 100, realizes the thin design of the touch display panel 100.

[0115] In some embodiments, as shown in FIG. 14, the second light extraction layer 312 is also configured to allow light of a corresponding color emitted by all the light emitting parts 133-1 to pass through; the optical functional layer 30 further includes a black matrix layer 321, which is arranged between the second light extraction layer 312 and the second touch metal layer 24, and the black matrix layer 321 includes at least one black matrix 321-1, and the orthographic projection of the black matrix 321-1 on the substrate 11 has no overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11.

[0116] Exemplarily, the second light extraction layer 312 can also be multiplexed as a gray color film layer 324, i.e., the second light extraction layer 312 is an integrated structure and can simultaneously transmit red light, green light, and blue light, for example, can simultaneously transmit red light of 610-650 nm wavelength band, green light of 515-565 nm wavelength band, and blue light of 450-480 nm wavelength band.

[0117] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some of the above embodiments is as follows: the touch buffer layer 21, the first touch metal layer 22, the first light extraction layer 311, the second touch metal layer 24, the black matrix layer 321, and the second light extraction layer 312 are sequentially formed. The preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 needs at least 6 processes, compared with the preparation process of sequentially forming the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the resist color film layer 322, and the protective layer 323, 5 processes are saved, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is also reduced, and the thin design of the touch display panel 100 is realized.

[0118] In some embodiments, as shown in FIGS. 9, 10, 11, 13, and 14, the black matrix 321-1 covers the isolation part 311-2 of the first light extraction layer 311. Since the black matrix layer 321 is arranged on the side of the second touch metal layer 24 away from the display layer 10, the isolation part 311-2 is arranged between the first touch metal 22-1 and the second touch metal 24-1, the black matrix 321-1 covers the isolation part 311-2 of the first light extraction layer 311, and the black matrix 321-1 also covers the second touch metal 24-1 between the black matrix 321-1 and the isolation part 311-2, effectively preventing the second touch metal 24-1 from leaking light from the side, and improving the quality of the touch display panel 100.

[0119] In some embodiments, as shown in FIG. 2B, the second light extraction layer 312 is arranged between the first touch metal layer 22 and the second touch metal layer 24, and the first light extraction layer 311 is arranged between the display layer 10 and the second light extraction layer 312. Specifically, the first light extraction layer 311 is arranged between the touch buffer layer 21 and the second light extraction layer 312. The first light extraction layer 311 includes at least one light extraction part 311-1, one light extraction part 311-1 corresponds to one light emitting part 133-1, and the orthographic projection of the light extraction part 311-1 on the substrate 11 covers the orthographic projection of the light emitting part 133-1 on the substrate 11, for example; the second light extraction layer 312 at least covers the side of the light extraction part 311-1, for example, the second light extraction layer 312 completely covers the light extraction part 311-1; and the second light extraction layer 312 includes a part between the opposite first touch metal 22-1 and the second touch metal 24-1.

[0120] Exemplarily, the second light-taking layer 312 covers the at least one light-taking part 311-1, and the second light-taking layer 312 is located on the side of the light-taking part 311-1 away from the substrate 11, covering the light-taking part 311-1. The light-taking part 311-1 is configured to cooperate with the second light-taking layer 312 to realize the function of the light-enhancing layer 31 of improving the light extraction efficiency. Specifically, the light-emitting device E in the touch display panel 100 emits light, and part of the light is incident on the first touch metal layer 22 or the second touch metal layer 24. Since the first touch metal layer 22 or the second touch metal layer 24 is opaque, the part of the light is blocked, thereby reducing the light extraction efficiency of the touch display panel 100. The cross section of the light-taking part 311-1 along the thickness direction of the touch display panel 100 is, for example, a trapezoid. The second light-taking layer 312 covers the light-taking part 311-1. The position where the light-taking part 311-1 contacts the second light-taking layer 312 is a slope and forms a stack with a refractive index difference. Part of the light that is originally blocked by the first touch metal layer 22 or the second touch metal layer 24 or the black matrix layer 321 due to a large emission angle can pass through the stack with the refractive index difference. After passing through the stack with the refractive index difference, the part of the light is refracted, so that the part of the light changes the emission angle and is not blocked by the first touch metal layer 22 or the second touch metal layer 24 or the black matrix layer 321. Thus, the part of the light can be emitted out of the touch display panel 100, thereby improving the light extraction efficiency of the touch display panel 100. The second light-taking layer 312 includes a portion located between the opposite first touch metal 22-1 and the second touch metal 24-1, which is configured to insulate the opposite first touch metal 22-1 and the second touch metal 24-1 and prevent the first touch metal 22-1 and the second touch metal 24-1 from being conductive, thereby affecting the touch function of the touch display panel 100.

[0121] In some embodiments, as shown in FIG. 15, the optical functional layer 30 further includes a black matrix layer 321, a light-blocking color film layer 322, and a protective layer 323. The black matrix layer 321 is disposed on the side of the second touch metal layer 24 away from the display layer 10. The black matrix layer 321 includes at least one black matrix 321-1, and the orthogonal projection of the black matrix 321-1 on the substrate 11 does not overlap with the orthogonal projection of the light-emitting part 133-1 on the substrate 11. The light-blocking color film layer 322 is disposed on the side of the black matrix layer 321 away from the display layer 10. The light-blocking color film layer 322 includes at least one light-blocking part 322-1, and one light-blocking part 322-1 corresponds to one light-emitting part 133-1. The protective layer 323 is disposed on the side of the light-blocking color film layer 322 away from the display layer 10.

[0122] Exemplarily, the specific structures of the black matrix layer 321, the light-blocking color film layer 322, and the protective layer 323 are as described above, and details are not described herein.

[0123] Exemplarily, the black matrix 321-1 of the black matrix layer 321 covers the second touch metal 24-1, effectively preventing the second touch metal 24-1 from leaking light from the side, and improving the quality of the touch display panel 100.

[0124] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some of the above embodiments is as follows: sequentially forming the touch buffer layer 21, the first touch metal layer 22, the first light extraction layer 311, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321, the photoresist color film layer 322, and the protective layer 323, or sequentially forming the touch buffer layer 21, the first light extraction layer 311, the first touch metal layer 22, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321, the photoresist color film layer 322, and the protective layer 323, wherein forming the photoresist color film layer 322 includes forming a red photoresist 322-1 / R, forming a green photoresist 322-1 / G, and forming a blue photoresist 322-1 / B, and the order of forming the red photoresist 322-1 / R, the green photoresist 322-1 / G, and the blue photoresist 322-1 / B is not limited in the present disclosure. Therefore, the preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 requires at least 10 processes, which saves 1 process compared to sequentially forming the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the photoresist color film layer 322, and the protective layer 323, saves preparation time, improves production efficiency, improves production capacity, and also reduces the thickness of the touch display panel 100, achieving thin design of the touch display panel 100.

[0125] In some embodiments, as shown in FIG. 16, the optical functional layer 30 further includes a black matrix layer 321 and a gray color film layer 324; the black matrix layer 321 is disposed on the side of the second touch metal layer 24 away from the display layer 10, the black matrix layer 321 includes at least one black matrix 321-1, and the orthogonal projection of the black matrix 321-1 on the substrate 11 does not overlap with the orthogonal projection of the light emitting part 133-1 on the substrate 11; the gray color film layer 324 is disposed on the side of the black matrix layer 321 away from the display layer 10, and the gray color film layer 324 is configured to allow light of all corresponding colors emitted by the light emitting part 133-1 to pass through.

[0126] Exemplarily, the specific structure of the gray color film layer 324 is as described above, which is not repeated here.

[0127] Exemplarily, the light-blocking color film layer 322 includes, for example, a red light-blocking layer 322-1 / R, a green light-blocking layer 322-1 / G and a blue light-blocking layer 322-1 / B. In the preparation of the light-blocking color film layer 322, three processes are required to be performed to complete the preparation. The surface of the gray color film layer 324 is flat and has an integrated structure, and only one process is required to complete the preparation. Moreover, the gray color film layer 324 does not need to be protected by the protection layer 323 or the flatness of the surface of the gray color film layer 324 needs to be increased.

[0128] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 in some embodiments described above is as follows: the touch buffer layer 21, the first touch metal layer 22, the first light extraction layer 311, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321 and the gray color film layer 324 are sequentially formed, or the touch buffer layer 21, the first light extraction layer 311, the first touch metal layer 22, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321 and the gray color film layer 324 are sequentially formed. The preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 requires at least 7 processes. Compared with the preparation process of the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the light-blocking color film layer 322 and the protection layer 323, 4 processes are saved, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is reduced, thereby realizing the thin design of the touch display panel 100.

[0129] It can be understood that, in order to further protect the gray color film layer 324, the protection layer 323 can be arranged above the gray color film layer 324, and the disclosure is not limited in this regard.

[0130] In some embodiments, as shown in FIG. 17, the second light extraction layer 312 is further configured to include at least one light-blocking layer 312-1, and one light-blocking layer 312-1 corresponds to one light emitting part 133-1; or, as shown in FIG. 18, the second light extraction layer 312 is further configured to allow light of a corresponding color emitted by at least one light emitting part 133-1 to pass through; the optical functional layer 30 further includes the black matrix layer 321 and the protection layer 323; the black matrix layer 321 is arranged on a side of the second touch metal layer 24 away from the display layer 10, the black matrix layer 321 includes at least one black matrix 321-1, and the orthographic projection of the black matrix 321-1 on the substrate 11 does not overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11; and the protection layer 323 is arranged on a side of the black matrix layer 321 away from the display layer 10.

[0131] Exemplarily, as shown in FIG. 17, the second light extraction layer 312 can be multiplexed as the light blocking color film layer 322, that is, the second light extraction layer 312 includes at least one light blocking 312-1, for example, can include a plurality of red light blocks, a plurality of green light blocks and a plurality of blue light blocks, and there can be a gap between adjacent two light blocks 312-1 of the second light extraction layer 312, and / or there can be an intersecting and overlapping part between adjacent two light blocks 312-1, therefore, the surface of the second light extraction layer 312 will appear uneven, and the protective layer 323 can be arranged above the second light extraction layer 312 to protect the second light extraction layer 312 and improve the flatness of the second light extraction layer 312. The light emitting part 133-1 can include a plurality of red light emitting parts 133-1 / R, a plurality of green light emitting parts 133-1 / G and a plurality of blue light emitting parts 133-1 / B, one red light block corresponds to one red light emitting part 133-1 / R, one green light block corresponds to one green light emitting part 133-1 / G, and one blue light block corresponds to one blue light emitting part 133-1 / B; the red light block can make the red light emitted by the red light emitting part 133-1 / R normally transmit, for example, can make the red light in the wavelength range of 610nm-650nm transmit, while absorbing the green light emitted by the green light emitting part and the blue light emitted by the blue light emitting part; the green light block can make the green light emitted by the green light emitting part 133-1 / G normally transmit, for example, can make the green light in the wavelength range of 515nm-565nm transmit, while absorbing the red light emitted by the red light emitting part and the blue light emitted by the blue light emitting part; and the blue light block can make the blue light emitted by the blue light emitting part 133-1 / B normally transmit, for example, can make the blue light in the wavelength range of 450nm-480nm transmit, while absorbing the red light emitted by the red light emitting part and the green light emitted by the green light emitting part.

[0132] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some of the above embodiments is: sequentially forming the touch buffer layer 21, the first touch metal layer 22, the first light extraction layer 311, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321, and the protective layer 323, or sequentially forming the touch buffer layer 21, the first light extraction layer 311, the first touch metal layer 22, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321, and the protective layer 323, wherein the forming of the second light extraction layer 312 includes forming a red photoresist, forming a green photoresist, and forming a blue photoresist, and the order of forming the red photoresist, the green photoresist, and the blue photoresist is not limited in the present disclosure. The preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 needs at least 9 processes, compared with sequentially forming the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the photoresist color film layer 322, and the protective layer 323, 2 processes are saved, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is also reduced, realizing the thin design of the touch display panel 100.

[0133] Alternatively, the second light extraction layer 312 can be multiplexed as a gray color film layer 324, that is, the second light extraction layer 312 is an integrated structure and can simultaneously transmit red light, green light, and blue light, for example, can simultaneously transmit red light of a 610nm-650nm wave band, green light of a 515nm-565nm wave band, and blue light of a 450nm-480nm wave band.

[0134] Exemplarily, the preparation process of the touch layer 20 and the optical functional layer 30 of the touch display panel 100 in some of the above embodiments is: sequentially forming the touch buffer layer 21, the first touch metal layer 22, the first light extraction layer 311, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321, and the protective layer 323, or sequentially forming the touch buffer layer 21, the first light extraction layer 311, the first touch metal layer 22, the second light extraction layer 312, the second touch metal layer 24, the black matrix layer 321, and the protective layer 323, and the preparation process of the touch layer 20 and the optical functional layer 30 in the touch display panel 100 needs at least 7 processes, compared with sequentially forming the touch buffer layer 21, the first touch metal layer 22, the touch insulating layer 23, the second touch metal layer 24, the black matrix layer 321, the first light extraction layer 311, the second light extraction layer 312, the photoresist color film layer 322, and the protective layer 323, 4 processes are saved, the preparation time is saved, the production efficiency is improved, the production capacity is improved, and the thickness of the touch display panel 100 is also reduced, realizing the thin design of the touch display panel 100.

[0135] In some embodiments, as shown in FIG. 2A and FIG. 2B, the cross section of the light taking portion 311-1 of the first light taking layer 311 along the thickness direction of the touch display panel 100 is a trapezoid, and the slope angle a of the trapezoid is, for example, 50°-80°. Such a setting makes the position where the light taking portion 311-1 contacts the second light taking layer 312 a bevel and forms a stack with a refractive index difference, so that a part of the light originally blocked by the first touch metal layer 22 or the second touch metal layer 24 or the black matrix layer 321 due to large viewing angle emission can be refracted after passing through the stack with a refractive index difference, so that the part of the light changes the emission angle and is not blocked by the first touch metal layer 22 or the second touch metal layer 24 or the black matrix layer 321, so that the part of the light can be emitted out of the touch display panel 100, thereby improving the light emission rate and the light emission efficiency of the touch display panel 100 and reducing the power consumption of the touch display panel 100.

[0136] In some embodiments, as shown in FIG. 2A and FIG. 2B, the display layer 10 further includes a pixel defining layer 132, the pixel defining layer 132 includes at least one opening 132-1, and one light emitting portion 133-1 is located in one opening 132-1; the boundary of the orthographic projection of the light taking portion 311-1 of the first light taking layer 311 on the pixel defining layer 132 coincides with or has a gap with the lower boundary 132-11 of the opening 132-1 of the pixel defining layer 132, and the lower boundary 132-11 of the opening 132-1 of the pixel defining layer 132 is the boundary of the opening 132-1 close to the substrate 11.

[0137] It can be understood that since one light emitting portion 133-1 is located in one opening 132-1, and the orthographic projection of the light taking portion 311-1 on the substrate 11 covers the orthographic projection of the light emitting portion 133-1 on the substrate 11, when the boundary of the orthographic projection of the light taking portion 311-1 of the first light taking layer 311 on the pixel defining layer 132 has a gap with the lower boundary 132-11 of the opening 132-1 of the pixel defining layer 132, the boundary of the orthographic projection of the light taking portion 311-1 of the first light taking layer 311 on the pixel defining layer 132 surrounds the lower boundary 132-11 of the opening 132-1 of the pixel defining layer 132.

[0138] In some embodiments, as shown in FIG. 2A and FIG. 2B, the distance b between the boundary of the orthographic projection of the light taking portion 311-1 of the first light taking layer 311 on the pixel defining layer 132 and the lower boundary 132-11 of the opening 132-1 of the pixel defining layer 132 is 0-3um.

[0139] For example, b is 0.5um, 1um, 1.5um, 2um, 2.5um. To ensure that the light emitted by the light emitting portion 133-1 can be emitted out after being condensed by the light taking portion 311-1.

[0140] In some embodiments, as shown in FIG. 2A and FIG. 2B, the thickness c of the first light extraction layer 311 is 1 um-5 um, for example, 1.5 um, 2 um, 2.5 um, 3 um, 3.5 um, 4 um, 4.5 um; as shown in FIG. 2A, in the case that the first light extraction layer 311 is disposed between the first touch metal layer 22 and the second touch metal layer 24, the thickness d of the part of the second light extraction layer 312 above the corresponding light extraction part 311-1 is 1 um-4 um, for example, 1.5 um, 2 um, 2.5 um, 3 um, 3.5 um, so as to ensure the flow leveling effect of the second light extraction layer 312 and ensure the flatness of the second light extraction layer 312; as shown in FIG. 2B, in the case that the second light extraction layer 312 is disposed between the first touch metal layer 22 and the second touch metal layer 24, the thickness e of the part of the second light extraction layer 312 above the corresponding light extraction part 311-1 is greater than 1 um, for example, the thickness e of the part of the second light extraction layer 312 above the corresponding light extraction part 311-1 is 1 um-4 um, for example, 1.25 um, 1.3 um, 1.4 um, 1.5 um, 1.6 um, 1.7 um, 2 um, 2.5 um, 3 um, 3.5 um, so as to ensure the flow leveling effect of the second light extraction layer 312 and ensure the flatness of the second light extraction layer 312.

[0141] On the other hand, some embodiments of the present disclosure provide a preparation method of a touch display panel, as shown in FIG. 19, and referring to FIG. 2A, at least comprising S1-S5:

[0142] S1, forming a display layer 10, the display layer 10 comprising a substrate 11 and a light emitting layer 133 away from the substrate 11, the light emitting layer 133 comprising at least one light emitting part 133-1.

[0143] Exemplarily, the substrate 11 is provided, and the driving circuit layer 12, the light emitting device layer 13 and the encapsulation layer 14 are sequentially formed on one side of the substrate 11, thereby forming the display layer 10; the driving circuit layer 12 can comprise a semiconductor layer 121, a gate insulating layer 122, a gate conductive layer 123, an interlayer dielectric layer 124, a first source-drain conductive layer 125, a passivation layer 126, a first planarization layer 127, a second source-drain conductive layer 128, a second planarization layer 129; the light emitting device layer 13 can comprise a first electrode layer 131, a pixel definition layer 132, a light emitting layer 133 and a second electrode layer 134; the encapsulation layer 14 can comprise a first inorganic encapsulation layer 141, an organic encapsulation layer 142 and a second inorganic encapsulation layer 143.

[0144] The first electrode layer 131 is patterned to form at least one first electrode 131-1; a pixel defining layer 132 is formed on the side of the first electrode layer 131 away from the substrate 11, and the pixel defining layer 132 is patterned to form at least one opening 132-1, and one opening 132-1 exposes one first electrode 131-1; a light emitting layer 133 is formed on the side of the pixel defining layer 132 away from the substrate 11, and the light emitting layer 133 is patterned to form at least one light emitting part 133-1, for example, a plurality of red light emitting parts 133-1 / R, a plurality of green light emitting parts 133-1 / G, and a plurality of blue light emitting parts 133-1 / B, the red light emitting parts 133-1 / R emit red light, the green light emitting parts 133-1 / G emit green light, and the blue light emitting parts 133-1 / B emit blue light, and one light emitting part 133-1 is located in one opening 132-1; a second electrode layer 134 is formed on the side of the light emitting layer 133 away from the substrate 11, and the second electrode layer 134 is entirely laid or patterned to form at least one second electrode, and one second electrode corresponds to one light emitting part 133-1.

[0145] S2, a first touch metal layer 22 is formed on the light emitting side of the display layer 10, the first touch metal layer 22 includes at least one first touch metal 22-1, and the orthographic projection of the first touch metal 22-1 on the substrate 11 has no overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11.

[0146] Exemplarily, the touch buffer layer 21 and the first touch metal layer 22 are formed on the side of the encapsulation layer 14 of the display layer 10 away from the substrate 11. It should be noted that, in some embodiments, the encapsulation layer 14 of the display layer 10 is directly used as the touch buffer layer 21 of the touch layer 20; in yet some embodiments, the touch buffer layer 21 can be separately prepared on the side of the encapsulation layer 14 of the display layer 10 away from the substrate 11, and the present disclosure does not make any limitation.

[0147] Exemplarily, the first touch metal layer 22 is patterned to form at least one first touch metal 22-1, and in order to prevent the first touch metal 22-1 from shielding the light emitted by the light emitting part 133-1, the at least one first touch metal 22-1 can be arranged in the interval region between adjacent light emitting parts 133-1, so that the orthographic projection of the first touch metal 22-1 on the substrate 11 has no overlap with the orthographic projection of the light emitting part 133-1 on the substrate 11.

[0148] S3, a first light taking layer 311 is formed on the side of the first touch metal layer 22 away from the display layer 10.

[0149] Exemplarily, the first light-taking layer 311 is patterned, and at least part of the pattern of the first light-taking layer 311 is located above the first touch control metal 22-1, serving as a touch control insulating layer 23 of the touch control layer 20, and used to isolate the first touch control metal 22-1 from the second touch control metal 24-1 to be formed.

[0150] S4, forming a second touch control metal layer 24 on a side of the first light-taking layer 311 away from the display layer 10, the second touch control metal layer 24 including at least one second touch control metal 24-1, the second touch control metal 24-1 and the first touch control metal 22-1 at least partially facing each other, and a projection of the second touch control metal 24-1 on the substrate 11 having no overlap with a projection of the light emitting part 133-1 on the substrate 11; the first light-taking layer 311 including a part located between the facing first touch control metal 22-1 and the second touch control metal 24-1.

[0151] Exemplarily, the second touch control metal layer 24 is patterned to form at least one second touch control metal 24-1, the second touch control metal 24-1 and the first touch control metal 22-1 at least partially facing each other, and at least part of the pattern of the first light-taking layer 311 being between the second touch control metal 24-1 and the first touch control metal 22-1, and the second touch control metal 24-1 and the first touch control metal 22-1 being used to realize touch control function; in order to prevent the second touch control metal 24-1 from blocking light emitted by the light emitting part 133-1, at least one second touch control metal 24-1 can be arranged in an interval region between adjacent light emitting parts 133-1, so that a projection of the second touch control metal 24-1 on the substrate 11 has no overlap with a projection of the light emitting part 133-1 on the substrate 11.

[0152] S5, forming a second light-taking layer 312 on a side of the second touch control metal layer 24 away from the display layer 10.

[0153] Exemplarily, the second light-taking layer 312 can be laid as a whole layer, the second light-taking layer 312 directly contacting another part of the pattern of the first light-taking layer 311 to form a stack with refractive index difference, and improve light extraction efficiency of the touch control display panel 100.

[0154] In some embodiments, some embodiments of the present application provide still another method for manufacturing a touch control display panel, as shown in FIG. 20, and referring to FIG. 2B, at least comprising S1'~S5':

[0155] S1', forming a display layer 10, the display layer 10 including a substrate 11 and a light emitting layer 133 away from the substrate 11, the light emitting layer 133 including at least one light emitting part 133-1.

[0156] The structure of the display layer 10 is as described above, and will not be repeated here.

[0157] S2', forming a first touch metal layer 22 on the light-out side of the display layer 10, the first touch metal layer 22 comprising at least one first touch metal 22-1, a projection of the first touch metal 22-1 on the substrate 11 has no overlap with a projection of the light emitting part 133-1 on the substrate 11.

[0158] The first touch metal layer 22 structure is as described above, and will not be repeated here.

[0159] S3', forming a first light extraction layer 311 on the light-out side of the display layer 10.

[0160] Exemplarily, S3' comprises forming an initial first light extraction layer on a side of the first touch metal layer 22 away from the display layer 10, the initial first light extraction layer being laid over the first touch metal layer 22 and the display layer 10, patterning the initial first light extraction layer to expose the first touch metal 22-1, i.e. there is no pattern of the first light extraction layer 311 over the first touch metal 22-1, forming the first light extraction layer 311.

[0161] S4', forming a second light extraction layer 312 on a side of the first light extraction layer 311 away from the display layer 10.

[0162] Exemplarily, the second light extraction layer 312 can be laid as a whole layer, the second light extraction layer 312 covering the pattern of the first touch metal 22-1 and the first light extraction layer 311, the second light extraction layer 312 covering part of the first touch metal 22-1 for isolating the first touch metal 22-1 from the second touch metal 24-1 to be formed; the second light extraction layer 312 covering part of the pattern of the first light extraction layer 311, achieving direct contact between the second light extraction layer 312 and the first light extraction layer 311, forming a stack with refractive index difference, and improving the light-out efficiency of the touch display panel 100.

[0163] S5', forming a second touch metal layer 24 on a side of the second light extraction layer 312 away from the display layer 10, the second touch metal layer 24 comprising at least one second touch metal 24-1, the second touch metal 24-1 and the first touch metal 22-1 at least partially facing each other, a projection of the second touch metal 24-1 on the substrate 11 has no overlap with a projection of the light emitting part 133-1 on the substrate 11; the second light extraction layer 312 comprising a part between the facing first touch metal 22-1 and the second touch metal 24-1.

[0164] Exemplarily, the second touch metal layer 24 is patterned to form at least one second touch metal 24-1, the second touch metal 24-1 and the first touch metal 22-1 at least partially face each other, and there is at least part of a pattern of the second light-taking layer 312 between the second touch metal 24-1 and the first touch metal 22-1, and the second touch metal 24-1 and the first touch metal 22-1 are used to realize a touch function; in order to prevent the second touch metal 24-1 from blocking the light emitted by the light-emitting part 133-1, at least one second touch metal 24-1 can be arranged in the interval area between adjacent light-emitting parts 133-1, so that the orthographic projection of the second touch metal 24-1 on the substrate 11 does not overlap with the orthographic projection of the light-emitting part 133-1 on the substrate 11.

[0165] In some embodiments, the order of preparing the first touch metal layer 22 and the first light-taking layer 311 in the above method for manufacturing the touch display panel can be interchanged, as shown in FIG. 21, and with reference to FIG. 2B, for example, S2', a first light-taking layer 311 is formed on the light-emitting side of the display layer 10, the first light-taking layer 311 includes light-taking parts 311-1, one light-taking part 311-1 corresponds to one light-emitting part 133-1, and the orthographic projection of the light-taking part 311-1 on the substrate 11 covers the orthographic projection of the light-emitting part 133-1 on the substrate 11; S3', a first touch metal layer 22 is formed on the light-emitting side of the display layer 10, the first touch metal layer 22 includes at least one first touch metal 22-1, and the orthographic projection of the first touch metal 22-1 on the substrate 11 does not overlap with the orthographic projection of the light-emitting part 133-1 on the substrate 11. S3' includes forming an initial first touch metal layer on the side of the first light-taking layer 311 away from the display layer 10, the initial first touch metal layer is laid on the first light-taking layer 311 and the display layer 10, and the initial first touch metal layer is patterned to form the first touch metal layer 22.

[0166] On the other hand, a display device 1000 is provided, as shown in FIG. 22, which includes the touch display panel 100 as described above.

[0167] Exemplarily, the display device 1000 can be any device that displays, whether moving (e.g., a video) or stationary (e.g., a still image), and whether textual or pictorial. The display device includes, but is not limited to, a television, a mobile phone, a wearable device, a Personal Digital Assistant (PDA), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, a car display (e.g., a speedometer display, etc.), a navigation instrument, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rear view camera in a vehicle), an electronic photograph, an electronic billboard or sign, a projector, an architectural structure, a packaging and an aesthetic structure (e.g., a display of an image for a piece of jewelry), etc.

[0168] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in an appropriate manner.

[0169] The above description is merely illustrative of the disclosure and does not limit the scope of the disclosure. Any modification or replacement that those skilled in the art can think of within the technical scope of the disclosure should be encompassed within the scope of the disclosure. Therefore, the scope of the disclosure should be decided based on the scope of the claims.

Claims

1. A touch display panel, comprising: a display layer comprising a substrate and a light-emitting layer away from a side of the substrate, the light-emitting layer comprising at least one light-emitting portion; a touch layer disposed on a light-outgoing side of the display layer, the touch layer comprising a first touch metal layer and a second touch metal layer disposed on a side of the first touch metal layer away from the display layer, the first touch metal layer comprising at least one first touch metal, the second touch metal layer comprising at least one second touch metal, the first touch metal and the second touch metal at least partially facing each other, and a projection of the first touch metal and the second touch metal on the substrate having no overlap with a projection of the light-emitting portion on the substrate; and an optical functional layer disposed on the light-outgoing side of the display layer, the optical functional layer comprising a first light-taking layer and a second light-taking layer disposed on a side of the first light-taking layer away from the display layer; the first light-taking layer is disposed between the first touch metal layer and the second touch metal layer, and the first light-taking layer comprises a portion between the facing first touch metal and second touch metal; or the second light-taking layer is disposed between the first touch metal layer and the second touch metal layer, and the second light-taking layer comprises a portion between the facing first touch metal and second touch metal; the first light-taking layer is disposed between the first touch metal layer and the second touch metal layer, and the first light-taking layer comprises at least one light-taking portion and a separation portion, one light-taking portion corresponding to one light-emitting portion, and the separation portion being between the facing first touch metal and second touch metal; the at least one light-taking portion and the separation portion are disposed apart from each other; the second light-taking layer is disposed on a side of the second touch metal layer away from the display layer, and the second light-taking layer at least covers a side surface of the at least one light-taking portion; the second light-taking layer covers the at least one light-taking portion; the optical functional layer further comprises: a black matrix layer disposed between the second light-taking layer and the second touch metal layer, the black matrix layer comprising at least one black matrix, a projection of the black matrix on the substrate having no overlap with a projection of the light-emitting portion on the substrate; a light-blocking color film layer disposed on a side of the second light-taking layer away from the display layer, the light-blocking color film layer comprising at least one light-blocking portion, one light-blocking portion corresponding to one light-emitting portion; and a protective layer disposed on a side of the light-blocking color film layer away from the display layer; the optical functional layer further comprises: a black matrix layer disposed between the second light-taking layer and the second touch metal layer, the black matrix layer comprising at least one black matrix, a projection of the black matrix on the substrate having no overlap with a projection of the light-emitting portion on the substrate; a gray color film layer disposed on a side of the second light-taking layer away from the display layer, the gray color film layer being configured to allow light of a corresponding color emitted by the at least one light-emitting portion to pass through; the second light-taking layer is further configured to comprise at least one light-blocking portion, one light-blocking portion corresponding to one light-emitting portion; and the optical functional layer further comprises: ​ ​ ​ ​ ​ 2.The touch display panel of claim 1, wherein, ​ ​ 3.The touch display panel of claim 2, wherein, ​ 4.The touch display panel of claim 2 or 3, wherein, ​ ​ ​ ​ 5.The touch display panel of claim 2 or 3, wherein, ​ ​ ​ ​ 6.The touch display panel of claim 2 or 3, wherein, ​ A black matrix layer is arranged between the second light-taking layer and the second touch metal layer, and the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate. A protective layer is arranged on a side of the second light-taking layer away from the display layer. 7.The touch display panel of claim 2 or 3, wherein, The second light-taking layer is further configured to allow light of a corresponding color emitted by the at least one light-emitting part to pass through; and the optical functional layer further comprises: A black matrix layer is arranged between the second light-taking layer and the second touch metal layer, and the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate. 8.The touch display panel of any one of claims 4-7, wherein, The black matrix covers the isolation part of the first light-taking layer. 9.The touch display panel of claim 1, wherein, The second light-taking layer is arranged between the first touch metal layer and the second touch metal layer, and the first light-taking layer is arranged between the display layer and the second light-taking layer. The first light-taking layer comprises at least one light-taking part, one light-taking part corresponds to one light-emitting part, and a projection of the light-taking part on the substrate covers a projection of the light-emitting part on the substrate. The second light-taking layer at least covers a side surface of the at least one light-taking part, and the second light-taking layer comprises a part between the first touch metal and the second touch metal. 10.The touch display panel of claim 9, wherein, The second light-taking layer covers the at least one light-taking part. 11.The touch display panel of claim 9 or 10, wherein, The optical functional layer further comprises: A black matrix layer is arranged on a side of the second touch metal layer away from the display layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate. A light-blocking color film layer is arranged on a side of the black matrix layer away from the display layer, and the light-blocking color film layer comprises at least one light-blocking part, one light-blocking part corresponding to one light-emitting part. A protective layer is arranged on a side of the light-blocking color film layer away from the display layer. 12.The touch display panel of claim 9 or 10, wherein, The optical functional layer further comprises: A black matrix layer is arranged on a side of the second touch metal layer away from the display layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate. A gray color film layer is arranged on a side of the black matrix layer away from the display layer, and the gray color film layer is configured to allow light of a corresponding color emitted by the at least one light-emitting part to pass through. The second light-taking layer is further configured to comprise at least one light-blocking part, one light-blocking part corresponding to one light-emitting part; or, the second light-taking layer is further configured to allow light of a corresponding color emitted by the at least one light-emitting part to pass through. 13.The touch display panel of claim 9 or 10, wherein, The optical functional layer further comprises: A black matrix layer is arranged on a side of the second touch metal layer away from the display layer, the black matrix layer comprises at least one black matrix, and a projection of the black matrix on the substrate does not overlap with a projection of the light-emitting part on the substrate. A protective layer is arranged on a side of the black matrix layer away from the display layer. The refractive index of the first light-taking layer is greater than the refractive index of the second light-taking layer. 14.The touch display panel of any one of claims 2-13, wherein, ​ 15.The touch display panel of claim 14, wherein, The refractive index of the first light extraction layer is greater than or equal to 1.5; and the refractive index of the second light extraction layer is less than or equal to 1.

5. 16.The touch display panel of any one of claims 2-15, wherein, A cross section of the light extraction part of the first light extraction layer along a thickness direction of the touch display panel is a trapezoid. 17.The touch display panel of any one of claims 2-16, wherein, The display layer further comprises a pixel defining layer, the pixel defining layer comprises at least one opening, and one light emitting part is located in one opening; a boundary of a normal projection of the light extraction part of the first light extraction layer on the pixel defining layer coincides with or has a gap with a lower boundary of the opening of the pixel defining layer, and the lower boundary of the opening of the pixel defining layer is a boundary of the opening close to the substrate. 18.The touch display panel of any one of claims 1-17, wherein, The thickness of the first light extraction layer is 1 um to 5 um. The first light extraction layer is arranged between the first touch metal layer and the second touch metal layer, and the thickness of the part of the second light extraction layer above the corresponding light extraction part is 1 um to 4 um when the second light extraction layer covers the at least one light extraction part. The second light extraction layer is arranged between the first touch metal layer and the second touch metal layer, and the thickness of the part of the second light extraction layer above the corresponding light extraction part is greater than 1 um when the second light extraction layer covers the at least one light extraction part.

19. A preparation method of a touch display panel, comprising: forming a display layer, the display layer comprising a substrate and a light emitting layer away from the substrate, the light emitting layer comprising at least one light emitting part; forming a first touch metal layer on a light emitting side of the display layer, the first touch metal layer comprising at least one first touch metal, a normal projection of the first touch metal on the substrate having no overlap with a normal projection of the light emitting part on the substrate; forming a first light extraction layer away from the display layer on a side of the first touch metal layer; forming a second touch metal layer away from the display layer on a side of the first light extraction layer, the second touch metal layer comprising at least one second touch metal, the second touch metal and the first touch metal at least partially facing each other, a normal projection of the second touch metal on the substrate having no overlap with the normal projection of the light emitting part on the substrate; the first light extraction layer comprising a part between the first touch metal and the second touch metal facing each other; forming a second light extraction layer away from the display layer on a side of the second touch metal layer; or, forming a display layer, the display layer comprising a substrate and a light emitting layer away from the substrate, the light emitting layer comprising at least one light emitting part; forming a first touch metal layer on a light emitting side of the display layer, the first touch metal layer comprising at least one first touch metal, a normal projection of the first touch metal on the substrate having no overlap with a normal projection of the light emitting part on the substrate; forming a first light extraction layer on the light emitting side of the display layer; forming a second light extraction layer away from the display layer on a side of the first light extraction layer; ​ a second touch metal layer is formed on a side of the second light-taking layer away from the display layer, the second touch metal layer comprises at least one second touch metal, the second touch metal and the first touch metal at least partially face each other, and a projection of the second touch metal on the substrate does not overlap with a projection of the light-emitting part on the substrate; the second light-taking layer comprises a part between the facing first touch metal and second touch metal; or, a display layer is formed, the display layer comprises a substrate and a light-emitting layer on a side of the substrate away from the substrate, and the light-emitting layer comprises at least one light-emitting part; a first light-taking layer is formed on a light-outgoing side of the display layer; a first touch metal layer is formed on a light-outgoing side of the display layer, the first touch metal layer comprises at least one first touch metal, and a projection of the first touch metal on the substrate does not overlap with a projection of the light-emitting part on the substrate; a second light-taking layer is formed on a side of the first light-taking layer away from the display layer; a second touch metal layer is formed on a side of the second light-taking layer away from the display layer, the second touch metal layer comprises at least one second touch metal, the second touch metal and the first touch metal at least partially face each other, and a projection of the second touch metal on the substrate does not overlap with a projection of the light-emitting part on the substrate; the second light-taking layer comprises a part between the facing first touch metal and second touch metal.

20. A display device comprising the touch display panel according to any one of claims 1-18.

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