Touch display panel and display device

Abstract

The embodiment of the utility model discloses a touch display panel and a display device, the touch display panel comprises a display panel, the display panel comprises a display area, and the display area comprises a plurality of sub-pixel areas and spacing areas for spacing the plurality of sub-pixel areas; the touch control layer is located on the light emitting side of the display panel, and the touch control layer comprises touch control electrodes which are located in the display area and arranged around the sub-pixel area; the first refractive index layer is located on the side, away from the display panel, of the touch control layer, and the first refractive index layer comprises protruding structures located in the sub-pixel areas and first structures located in the interval areas; the black matrix is located on the side, away from the display panel, of the first structure, and the orthographic projection of the black matrix on the display panel covers the orthographic projection of the touch electrode on the display panel; the second refractive index layer is located on the side, away from the display panel, of the black matrix, the second refractive index layer at least covers the top face, away from the display panel, of the protruding structure and the side face connected with the top face, and the refractive index of the first refractive index layer is larger than that of the second refractive index layer.

Description

Technical Field

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

[0002] An organic light-emitting diode (OLED) display panel has many advantages such as self-luminescence, ultra-thinness, fast response speed, high contrast ratio, wide viewing angle, etc., and is a display panel that has received extensive attention at present. The OLED display panel usually adopts a thin film encapsulation structure (TFE) of an inorganic layer - an organic layer - an inorganic layer to achieve encapsulation, so as to encapsulate the organic light-emitting material inside the display panel, thereby achieving the purpose of blocking water and oxygen and realizing the protection of the organic light-emitting material.

[0003] In order to realize the touch display of the OLED display panel, a touch structure is usually directly fabricated on the TFE film layer of the OLED display panel, that is, the flexible multi-layer on cell (FMLOC) touch technology, which can prepare a lighter and thinner display device, and this technology can be applied to foldable and rollable OLED display devices.

[0004] In order to reduce the reflectivity of external light in the OLED display panel and reduce the thickness of the entire display panel, in the related art, the COE technology (CF on Encapsulation) of removing the polarizer (POL) is used, that is, a color filter structure is added on the TFE film layer of the OLED display panel. Summary of the Utility Model

[0005] Embodiments of the present disclosure provide a touch display panel and a display device, and the specific solutions are as follows:

[0006] A touch display panel provided by an embodiment of the present disclosure includes:

[0007] A display panel, the display panel includes a display area, the display area includes a plurality of sub-pixel areas and a spacer area that separates the plurality of sub-pixel areas from each other;

[0008] A touch layer, located on the light-emitting side of the display panel, the touch layer includes touch electrodes located in the display area and arranged around the sub-pixel areas;

[0009] A first refractive index layer, located on the side of the touch layer away from the display panel, the first refractive index layer includes a convex structure located in each of the sub-pixel areas and a first structure located in the spacer area, and the first structure covers the touch electrodes;

[0010] A black matrix is located on a side of the first structure facing away from the display panel, and a positive projection of the black matrix on the display panel covers a positive projection of the touch electrode on the display panel;

[0011] A second refractive index layer is located on a side of the black matrix facing away from the display panel. The second refractive index layer covers at least a top surface of the convex structure facing away from the display panel and side surfaces connected to the top surface. The refractive index of the first refractive index layer is greater than that of the second refractive index layer.

[0012] Optionally, in the touch display panel provided by the embodiments of the present disclosure, a positive projection of the black matrix on the display panel covers a positive projection of a top surface of the first structure facing away from the display panel on the display panel.

[0013] Optionally, in the touch display panel provided by the embodiments of the present disclosure, a positive projection of the black matrix on the display panel further covers a positive projection of side surfaces connected to the top surface of the first structure on the display panel.

[0014] Optionally, in the touch display panel provided by the embodiments of the present disclosure, a cross-section of the convex structure is a regular trapezoid.

[0015] Optionally, in the touch display panel provided by the embodiments of the present disclosure, a cross-section of the first structure is a regular trapezoid. The first structure and the convex structure are arranged at intervals, and the thickness of the first structure is the same as that of the convex structure.

[0016] Optionally, in the touch display panel provided by the embodiments of the present disclosure, the first refractive index layer further includes a second structure located in each sub-pixel region and between the convex structure and the touch layer. The thickness of the second structure is the same as that of the first structure, and the convex structure, the second structure, and the first structure are an integral structure.

[0017] Optionally, in the touch display panel provided by the embodiments of the present disclosure, a positive projection of the second refractive index layer on the display panel covers a display area of the display panel.

[0018] Optionally, in the touch display panel provided by the embodiments of the present disclosure, a light filtering layer is further included on a side of the second refractive index layer facing away from the display panel. The light filtering layer includes color filter structures corresponding to the sub-pixel regions one by one.

[0019] Optionally, in the touch display panel provided by the embodiments of the present disclosure, the refractive index of the first refractive index layer is greater than 1.8, and the refractive index of the second refractive index layer is 1.4 to 1.5.

[0020] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, the second refractive index layer includes a color filter structure provided in one-to-one correspondence with the sub-pixel regions, and the color filter structure covers the top surface of the convex structure facing away from the display panel and the side surface connected to the top surface.

[0021] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, the refractive index of the first refractive index layer is greater than 1.8, and the refractive index of the second refractive index layer is 1.6 to 1.7.

[0022] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, the black matrix encloses a plurality of first openings corresponding to the sub-pixel regions one by one, and each color filter structure is located in the corresponding first opening region.

[0023] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, adjacent color filter structures are in contact with each other, and the projection of the contact boundary of adjacent color filter structures on the display panel is located within the projection of the black matrix on the display panel.

[0024] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, it further includes a touch protection layer on the side of the color filter structure facing away from the display panel.

[0025] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, the display panel further includes a non-display area surrounding the display area, the non-display area includes at least one retaining wall provided around the display area, the first refractive index layer is located at the edge of the non-display area and ends at the side of the retaining wall closest to the display area facing the display area, and the black matrix is located at the edge of the non-display area and ends at the side of the retaining wall closest to the display area facing the display area.

[0026] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, the black matrix is located at the edge of the non-display area and is disposed substantially flush with the first refractive index layer located at the edge of the non-display area.

[0027] Optionally, in the above touch display panel provided by the embodiments of the present disclosure, the display panel includes: a driving backplane, and a pixel defining layer located between the driving backplane and the touch layer; the pixel defining layer includes a plurality of second openings corresponding to the sub-pixel regions one by one;

[0028] The projection boundary of the convex structure on the display panel is located within the projection of the pixel defining layer on the display panel.

[0029] Optionally, in the touch display panel provided by the embodiments of the present disclosure, the distance between the orthographic projection boundary of the convex structure on the display panel and the orthographic projection boundary of the inner wall of the second opening on the display panel is 1-2 μm.

[0030] Optionally, in the touch display panel provided by the embodiments of the present disclosure, the display panel further includes: a light-emitting functional layer located between the pixel defining layer and the touch layer, and a packaging layer located between the light-emitting functional layer and the touch layer;

[0031] The light-emitting functional layer includes a plurality of light-emitting units, the light-emitting units are located within the second opening, and the light-emitting units correspond to the second opening one by one.

[0032] Optionally, in the touch display panel provided by the embodiments of the present disclosure, the touch layer includes a touch buffer layer, a first metal layer, a touch insulating layer, and a second metal layer arranged in a stacked manner, and the touch buffer layer is close to the display panel;

[0033] The second metal layer includes the touch electrodes, the touch electrodes include a plurality of first touch electrodes arranged along a first direction and a plurality of second touch electrodes arranged along a second direction, and the first direction intersects the second direction;

[0034] The first touch electrodes include a plurality of first electrode blocks arranged along the second direction, and adjacent two of the first electrode blocks are electrically connected through a first connection portion, the second touch electrodes include a plurality of second electrode blocks arranged along the first direction, and adjacent two of the second electrode blocks are electrically connected through a second connection portion;

[0035] The first connection portion is located in the second metal layer, and the second connection portion is located in the first metal layer;

[0036] The first electrode blocks, the second electrode blocks, the first connection portion, and the second connection portion are respectively grid-like structures arranged around the sub-pixel region.

[0037] Correspondingly, the embodiments of the present disclosure further provide a display device, including the touch display panel provided by the embodiments of the present disclosure.

[0038] Correspondingly, the embodiments of the present disclosure further provide a method for manufacturing a touch display panel, including:

[0039] Forming a display panel, the display panel includes a display area, the display area includes a plurality of sub-pixel regions and a spacer region separating the plurality of sub-pixel regions from each other;

[0040] A touch layer is formed on the light-emitting side of the display panel, and the touch layer includes touch electrodes located in the display area and disposed around the sub-pixel area;

[0041] A first refractive index layer is formed on the side of the touch layer facing away from the display panel. The first refractive index layer includes convex structures located in each of the sub-pixel areas and a first structure located in the spacer area, and the first structure covers the touch electrodes;

[0042] A black matrix is formed on the side of the first structure facing away from the display panel. The orthographic projection of the black matrix on the display panel covers the orthographic projection of the touch electrodes on the display panel;

[0043] A second refractive index layer is formed on the side of the black matrix facing away from the display panel. The second refractive index layer covers at least the top surface of the convex structures facing away from the display panel and the side surfaces connected to the top surface. The refractive index of the first refractive index layer is greater than the refractive index of the second refractive index layer.

[0044] Optionally, in the above manufacturing method provided by the embodiments of the present disclosure, forming the first refractive index layer specifically includes:

[0045] A first refractive index material film layer is formed on the side of the touch layer facing away from the display panel;

[0046] A photoresist layer is formed on the side of the first refractive index material film layer facing away from the display panel;

[0047] The photoresist layer is patterned through a halftone mask process to form a first photoresist pattern including a photoresist completely retained area, a photoresist semi-retained area, and a photoresist completely removed area. The photoresist completely retained area at least corresponds to the sub-pixel area, the photoresist semi-retained area at least corresponds to the spacer area, and the photoresist completely removed area at least corresponds to the area where the barrier walls in the non-display area are located;

[0048] Using the first photoresist pattern as a mask, the first refractive index material film layer is etched to remove at least the first refractive index material film layer above the area where the barrier walls are located;

[0049] The first photoresist pattern is ashed to remove the photoresist in the photoresist semi-retained area and thin the photoresist in the photoresist completely retained area to form a second photoresist pattern;

[0050] Using the second photoresist pattern as a mask, etch the first refractive index material film layer corresponding to the photoresist semi-retained area to form the raised structure located in the sub-pixel area, the second structure located in the sub-pixel area and between the raised structure and the touch layer, and the first structure located in the spacer area. The raised structure, the second structure and the first structure are an integral structure;

[0051] Remove the second photoresist pattern. Description of the Drawings

[0052] Figure 1 It is a schematic plan view of a touch display panel provided by an embodiment of the present disclosure;

[0053] Figure 2 is Figure 1 a cross-sectional view of a partial sub-pixel area in the display area of;

[0054] Figure 3 is Figure 1 a cross-sectional view along the CC' direction in;

[0055] Figure 4 It is a schematic specific structure diagram of another touch display panel provided by an embodiment of the present disclosure;

[0056] Figure 5 It is a schematic specific structure diagram of another touch display panel provided by an embodiment of the present disclosure;

[0057] Figure 6 is Figure 5 a top view corresponding to the touch display panel shown;

[0058] Figure 7 It is a schematic specific structure diagram of another touch display panel provided by an embodiment of the present disclosure;

[0059] Figure 8 It is a schematic specific structure diagram of another touch display panel provided by an embodiment of the present disclosure;

[0060] Figure 9 It is a schematic specific structure diagram of another touch display panel provided by an embodiment of the present disclosure;

[0061] Figure 10 It is a schematic specific structure diagram of another touch display panel provided by an embodiment of the present disclosure;

[0062] Figure 11 It is a schematic flowchart of a manufacturing method of a touch display panel provided by an embodiment of the present disclosure;

[0063] Figure 12A provided by an embodiment of the present disclosure Figure 7A schematic structural diagram of the touch display panel shown during the manufacturing process;

[0064] Figure 12B Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0065] Figure 12C Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0066] Figure 12D Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0067] Figure 12E Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0068] Figure 12F Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0069] Figure 12G Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0070] Figure 12H Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0071] Figure 12I Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0072] Figure 12J Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0073] Figure 12K Provided by an embodiment of the present disclosure Figure 7 Another schematic structural diagram of the touch display panel shown during the manufacturing process;

[0074] Figure 13 A schematic structural diagram of a display device provided by an embodiment of the present disclosure. Detailed implementation manners

[0075] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0076] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprising" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Inside", "outside", "upper", "lower", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0077] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale, and are only intended to illustrate the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0078] The present disclosure provides a touch display panel, including a display panel 100 and a touch layer 200 located on a light emitting side of the display panel 100. Figure 1 As shown, Figure 1 It is a schematic diagram of the planar structure of the touch display panel, the display panel 100 includes a display area AA and a non-display area BB surrounding the display area AA, the display area AA generally includes a plurality of sub-pixel areas and a spacing area separating the plurality of sub-pixel areas from each other, the non-display area BB includes at least one blocking wall arranged around the display area AA, the embodiment of the present disclosure takes two blocking walls as an example, such as a first blocking wall Dam1 close to the display area AA and a second blocking wall Dam2 located on a side of the first blocking wall Dam1 away from the display area AA, the setting of the blocking walls can improve the water and oxygen barrier performance of the display panel 100.

[0079] Specifically, Figure 2 As shown, Figure 2 for Figure 1Schematic cross-section of a partial sub-pixel region within the display area AA. The display panel 100 includes: a driving backplane 1, a pixel definition layer 2 located between the driving backplane 1 and the touch layer 200, a light-emitting functional layer 3 located between the pixel definition layer 2 and the touch layer 200, and a packaging layer 4 located between the light-emitting functional layer 3 and the touch layer 200. Among them, the pixel definition layer 2 includes a plurality of second openings 201 corresponding one-to-one with the sub-pixel regions. The light-emitting functional layer 3 includes a plurality of light-emitting units 31. The light-emitting units 31 are located within the second openings 201 and correspond one-to-one with the second openings 201. The light-emitting unit 31 may include an anode layer 311, an organic light-emitting layer 312, and a cathode layer 313 sequentially stacked on the driving backplane 1. The anode layer 311 is generally fabricated before the pixel definition layer 2. The packaging layer 4 in the embodiments of the present disclosure can not only isolate the light-emitting functional layer 3 from the outside world, preventing water and oxygen from invading the organic light-emitting layer 312 in the light-emitting functional layer 3 of the display panel 100 and affecting the service life of the display panel, but also the surface of the packaging layer 4 facing away from the driving backplane 1 is flat, enabling subsequent deposited films (such as the touch layer) to be fabricated on a flat surface, which is more conducive to improving the touch display effect of the touch display panel.

[0080] It should be noted that the light-emitting units in the embodiments of the present disclosure may be OLED devices or Quantum Dot Light Emitting Diodes (QLED) devices, etc., and no specific limitation is made thereto.

[0081] In some embodiments, as Figure 2 shown, the driving backplane 1 includes: a substrate 11, a buffer layer 12, an active layer 13, a first gate insulating layer 14, a first gate metal layer 15, a second gate insulating layer 16, a second gate metal layer 17, an interlayer dielectric layer 18, a first source-drain metal layer 19 (SD1), a passivation layer 20, a first planarization layer 21, a second source-drain metal layer 22 (SD2), a second planarization layer 23, a third source-drain metal layer 24 (SD3), and a third planarization layer 25, which are sequentially stacked between the substrate 11 and the light-emitting functional layer 3. Among them, the anode layer 311 can be electrically connected to the source or drain of the first source-drain metal layer 19 through a lap electrode located on the second source-drain metal layer 22.

[0082] Optionally, the substrate 11 can be a rigid substrate or a flexible substrate. Among them, the rigid substrate can be, but is not limited to, glass, etc.; the flexible substrate can be, but is not limited to, polyethylene terephthalate, ethylene terephthalate, polyimide, etc.

[0083] Specifically, as Figure 2As shown, the first source / drain metal layer 19 is generally used to form the source electrode, drain electrode, data line, etc. The second source / drain metal layer 22 is generally used as the bonding electrode for the bonding anode layer 311 and the source / drain electrode. The third source / drain metal layer 24 generally uses the FIAA technology for narrow border products. This technology adds a third source / drain metal layer 24 and a third planarization layer 25. The third source / drain metal layer 24 is mainly used for routing data signals in the fanout area of the display panel 100 to achieve a narrow border design for the lower border.

[0084] In some embodiments, in the touch display panel provided in the embodiments of the present disclosure, as Figures 1-3 shown, Figure 3 For Figure 1 is a schematic cross-sectional view along the CC' direction in. The encapsulation layer 4 may include a first inorganic layer 41, an organic material layer 42, and a second inorganic layer 43 stacked. The first dam Dam1 and the second dam Dam2 may both be formed by stacking sub-dams provided on the same layer as the planarization layer (such as the first planarization layer 21 and the second planarization layer 23) and the pixel defining layer 2 in the display area AA. The height of the first dam Dam1 is generally less than the height of the second dam Dam2. For example, the first dam Dam1 is formed by stacking sub-dams 001 and 002 provided on the same layer as the second planarization layer 23 and the pixel defining layer 2 in the display area AA, and the second dam Dam2 is formed by stacking sub-dams 001, 002, and 003 provided on the same layer as the first planarization layer 21, the second planarization layer 23, and the pixel defining layer 2 in the display area AA. The edge of the organic material layer 42 of the encapsulation layer 4 terminates inside the first dam Dam1 closest to the display area AA.

[0085] Specifically, as Figure 1 and Figure 2 shown, a touch layer 200 is formed on the encapsulation layer 4 of the display panel 100. The touch layer 200 includes touch electrodes located in the display area AA and arranged around the sub-pixel area. Specifically, the touch layer 200 includes a touch buffer layer 5, a first metal layer 6, a touch insulating layer 7, and a second metal layer 8 stacked, and the touch buffer layer 5 is close to the display panel 100;

[0086] The second metal layer 8 includes touch electrodes. The touch electrodes include a plurality of first touch electrodes 81 arranged along the first direction X and a plurality of second touch electrodes 82 arranged along the second direction Y. The first direction X intersects the second direction Y. In the embodiments of the present disclosure, an example is given where the first direction X is perpendicular to the second direction Y;

[0087] The first touch electrode 81 includes a plurality of first electrode blocks 811 arranged along the second direction Y, and adjacent two first electrode blocks 811 are electrically connected through a first connection part 91. The second touch electrode 82 includes a plurality of second electrode blocks 821 arranged along the first direction X, and adjacent two second electrode blocks 821 are electrically connected through a second connection part 92;

[0088] The first connection part 91 can be located in the second metal layer 8, that is, the first electrode block 811, the second electrode block 821 and the first connection part 91 are arranged in the same layer. The second connection part 92 can be located in the first metal layer 6; in the subsequent introduction, the film layer where the first electrode block 811, the second electrode block 821 and the first connection part 91 are located is called the TMB layer, and the film layer where the second connection part 92 is located is called the TMA layer.

[0089] The first electrode block 811, the second electrode block 821, the first connection part 91 and the second connection part 92 are respectively grid-like structures arranged around the sub-pixel region.

[0090] Specifically, as Figure 1 shown, the non-display area BB can be divided into four border areas: upper, lower, left and right. The lower border area generally includes a bonding area B1. The touch layer 200 further includes a touch lead 210 electrically connected to the first touch electrode 81 and the second touch electrode 82. The touch lead 210 extends from the display area AA to the bonding area B1 in the lower border; the touch lead 210 is generally located between the first dam Dam1 and the display area AA in the upper, left and right borders. The touch lead 210 needs to cross the first dam Dam1 and the second dam Dam2 and extend to the bonding area B1 in the lower border.

[0091] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 1 shown, the lower border area further includes a bending area BD located between the second dam Dam2 and the bonding area B1; as Figure 1 and Figure 3 shown, the part of the touch lead 210 before leading out from the display area AA to the bending area BD generally adopts a double-layer metal trace. For example, the touch lead 210 includes a first sub-lead located in the TMA layer and a second sub-lead located in the TMB layer. The first sub-lead and the second sub-lead are electrically connected through a via hole penetrating the touch insulating layer 7 to reduce the resistance of the touch lead 210; the part of the touch lead 210 located in the bending area BD generally jumps to the SD2 layer, and the part of the touch lead 210 located in the bonding area B1 jumps to the TMA layer and the TMB layer again, that is, the part of the touch lead 210 located in the bonding area B1 adopts the electrically connected first sub-lead and second sub-lead again. It should be noted that Figure 3 only the second sub-lead of the touch lead 210 located in the TMB layer is shown.

[0092] It should be noted that the touch leads 210 can also adopt single-layer routing. For example, a part of the touch leads 210 is arranged on the TMA layer, and a part of the touch leads 210 is arranged on the TMB layer, which can save the routing space.

[0093] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 1 shown, the bonding area B1 includes a driving chip (IC) area and a flexible printed circuit board (FPC) area. The driving chip (IC) is used to provide an electrical signal to the display panel 100, and the flexible printed circuit board (FPC) is used to provide an electrical signal to the driving chip (IC) and the touch layer 200. The flexible printed circuit board (FPC) area of the bonding area B1 includes a plurality of bonding pads 300, and the touch leads 210 are electrically connected to the bonding pads 300 on both sides of the FPC.

[0094] Optionally, among the first touch electrode 81 and the second touch electrode 82, one is a driving electrode and the other is a sensing electrode.

[0095] Specifically, the touch insulating layer 7 can adopt an organic material, such as PI.

[0096] Specifically, the touch buffer layer 5 can adopt an organic material, such as PI; it can also adopt an inorganic material, such as silicon nitride, silicon oxide, silicon oxynitride, etc.

[0097] Specifically, as Figure 2 shown, the touch display panel further includes a first refractive index layer 30 on the side of the touch layer 200 facing away from the display panel 100. The first refractive index layer 30 includes a convex structure 32 corresponding to each sub-pixel area and a first structure 33 in the spacer area. The first structure 33 covers the touch electrodes (81 / 82); the touch display panel further includes a black matrix 40 on the side of the first structure 33 facing away from the display panel 100, and a second refractive index layer 50 on the side of the black matrix 40 facing away from the display panel 100; wherein, the orthographic projection of the black matrix 40 on the display panel 100 covers the orthographic projection of the touch electrodes (81 / 82) on the display panel 100, that is, the orthographic projection of the black matrix 40 on the display panel 100 covers the orthographic projection of the spacer area between the sub-pixel areas on the display panel 100; the second refractive index layer 50 at least covers the top surface 321 of the convex structure 32 facing away from the display panel 100 and the side surface 322 connected to the top surface 321. The refractive index of the first refractive index layer 30 is greater than the refractive index of the second refractive index layer 50, so that a high-low refractive index interface formed by the first refractive index layer 30 and the second refractive index layer 50 can be formed at the edge of the sub-pixel area.

[0098] On one hand, for the touch display panel provided by the embodiments of the present disclosure, by utilizing the refractive index difference between the first refractive index layer with a high refractive index and the second refractive index layer with a low refractive index, the light emitted by the light-emitting unit undergoes refraction at the interface between the first refractive index layer and the second refractive index layer, enabling more light to exit from the corresponding sub-pixel region, thereby improving the light extraction efficiency. On the other hand, the first refractive index layer of the present disclosure is formed before the black matrix. Compared with the case where the first refractive index layer is fabricated after the black matrix, the convex structure of the present disclosure can avoid the openings of the black matrix. That is, when fabricating the convex structure of the present disclosure, there is no influence of the black matrix pattern around it, and the slope angle morphology around the convex structure can be better controlled (for example, the symmetry of the relatively arranged slope angles is better), which is beneficial to improving the light extraction efficiency, thereby reducing the L-Decay (the light luminance attenuation curve of the display panel with the viewing angle) of the touch display panel and reducing problems such as color shift.

[0099] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the orthographic projection of the black matrix 40 on the display panel 100 covers the orthographic projection of the top surface 331 of the first structure 33 facing away from the display panel 100 on the display panel 100. Specifically, by arranging the first refractive index layer 30 to cover the first structure 33 covering the touch electrode, it is possible to avoid the influence of the developer during the subsequent fabrication of the black matrix 40 and other film layers on the touch electrode, such as corrosion.

[0100] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the cross-section of the convex structure 32 is a regular trapezoid. Since the refractive index of the first refractive index layer 30 is greater than that of the second refractive index layer 50, it is similar to forming a convex lens structure above the sub-pixel region, and this structure can condense the light emitted by the light-emitting unit 31, improving the light extraction efficiency.

[0101] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the cross-section of the first structure 33 is a regular trapezoid. The first structure 33 and the convex structure 32 are arranged at intervals, and the thickness of the first structure 33 and the thickness of the convex structure 32 can be the same. Of course, the thickness of the first structure 33 and the thickness of the convex structure 32 can have an error of ±5%.

[0102] It should be noted that the above-mentioned regular trapezoid refers to a shape similar to a regular trapezoid. Due to the influence of the manufacturing process, the surfaces of the convex structure 32 and the first structure 33 facing away from the display panel 100 in the cross-section may be arc-shaped.

[0103] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2As shown, the positive projection of the second refractive index layer 50 on the display panel 100 can cover the display area AA of the display panel 100. Specifically, the material of the second refractive index layer 50 can be an organic material such as epoxy resin, and the material of the first refractive index layer 30 can be an organic material such as epoxy resin doped with inorganic ions such as zirconia to increase the refractive index of the first refractive index layer 30. For example, the refractive index of the first refractive index layer 30 is generally greater than 1.8, and the refractive index of the second refractive index layer 50 is generally 1.4 to 1.5, thereby forming a high-low refractive index interface and improving the light extraction efficiency.

[0104] In some embodiments, in the above-mentioned touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, it further includes a color filter layer 60 located on the side of the second refractive index layer 50 facing away from the display panel 100. The color filter layer 60 includes color filter structures (R, G, B) corresponding to the sub-pixel regions one by one. Specifically, there are multiple sub-pixel regions in the display area of the display panel 100, such as a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region. The color filter structures correspondingly include a red color filter structure (such as a red color film R), a green color filter structure (such as a green color film G), and a blue color filter structure (such as a blue color film B). On the one hand, the color filter structure can filter the emitted light to improve the color purity of the emitted light. On the other hand, the color filter structure can filter the external light, reduce the ambient light entering the touch display panel, and further reduce the reflection of the touch display panel to the ambient light, thereby improving the user experience.

[0105] In some embodiments, in the above-mentioned touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the black matrix 40 encloses a plurality of first openings 401 corresponding to the sub-pixel regions one by one, and each color filter structure (R, G, B) is located in the corresponding first opening 401 region, that is, the adjacent color filter structures (R, G, B) are not in close contact.

[0106] Specifically, as Figure 2 shown, the distance between the positive projection boundary of the black matrix 40 on the display panel 100 and the positive projection boundary of the first refractive index layer 30 on the display panel 100 can be 0.5 to 1 μm.

[0107] In some embodiments, in the above-mentioned touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the thickness of the first refractive index layer 30 can be 2 to 3.5 μm, and the thickness of the black matrix 40 can be 1.2 to 1.8 μm.

[0108] In some embodiments, in the above-mentioned touch display panel provided by the embodiments of the present disclosure, as Figure 1 and Figure 3As shown, the first refractive index layer 30 is located at the edge of the non-display area BB and ends at the side of the dam (i.e., the first dam Dam1) closest to the display area AA facing the display area AA, and the black matrix 40 is located at the edge of the non-display area BB and ends at the side of the dam (i.e., the first dam Dam1) closest to the display area AA facing the display area AA. Specifically, due to the setting of the first dam Dam1, the step difference between the side of the first dam Dam1 close to the display area AA and the first dam Dam1 is relatively large, which easily leads to the risk of peeling of the black matrix 40. In the present disclosure, by forming the first refractive index layer 30 with a relatively large thickness before the black matrix 40, the first refractive index layer 30 can reduce the step difference between the side of the first dam Dam1 close to the display area AA and the first dam Dam1. Thus, when the black matrix 40 is formed, the black matrix 40 will not accumulate thickly in the step difference area, so that the black matrix 40 can be completely exposed during exposure, avoiding the peeling of the black matrix 40 during development and improving the performance of the touch display panel.

[0109] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 1 and Figure 3 shown, the black matrix 40 is disposed substantially flush with the edge of the non-display area BB where the first refractive index layer 30 is located at the edge of the non-display area BB, for example, with a deviation of ±5% in width left and right.

[0110] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the slope angles of the convex structure 32 and the first structure 33 can be 50 to 80°, and the light extraction efficiency corresponding to the slope angles in this range is relatively good.

[0111] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, the orthographic projection boundary of the convex structure 32 on the display panel 100 is located within the orthographic projection of the pixel defining layer 2 on the display panel 100, so that the convex structure 32 can completely cover the sub-pixel area, which is beneficial to converging the light emitted by the light emitting units 31 in the sub-pixel area.

[0112] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2As shown, the distance a between the orthographic projection boundary of the convex structure 32 on the display panel 100 and the orthographic projection boundary of the inner wall of the second opening 201 on the display panel 100 can be 1 - 2 μm, and the distance b between the orthographic projection boundary of the first structure 33 on the display panel 100 and the orthographic projection boundary of the inner wall of the second opening 201 on the display panel 100 can be 5 - 7 μm. In this way, on the one hand, it is ensured that the convex structure 32 can completely cover the sub-pixel area, and on the other hand, it is ensured that the convex structure 32 and the first structure 33 are spaced apart.

[0113] In some embodiments, in the above touch display panel provided by the embodiments of the present disclosure, as Figure 2 shown, it further includes a touch protection layer 400 located on the side of the color filter structure (R, G, B) away from the display panel 100. The touch protection layer 400 can protect the color filter structure (R, G, B), thereby protecting the display effect of the touch display panel and improving the reliability of the touch display panel; the material of the touch protection layer 400 can be an organic material, such as PI, etc.

[0114] In some embodiments, the embodiments of the present disclosure also provide a touch display panel, as Figure 4 shown, Figure 4 shown, the structure of the touch display panel is basically the same as that of Figure 2 shown, the difference between the two is only the structure of the color filter structure (R, G, B), and the other film layer structures are the same, and it has Figure 2 the same technical effects as the touch display panel shown. Specifically, as Figure 4 shown, adjacent color filter structures (R, G, B) are in contact with each other, and the orthographic projection of the contact boundary of adjacent color filter structures (R, G, B) on the display panel 100 is located within the orthographic projection of the black matrix 40 on the display panel 100.

[0115] In some embodiments, the embodiments of the present disclosure also provide a touch display panel, as Figure 5 and Figure 6 shown, Figure 6 is Figure 5 the top view corresponding to the touch display panel shown, Figure 5 shown, the structure of the touch display panel is basically the same as that of Figure 2 shown, the difference between the two is only the structure of the black matrix 40, and the other film layer structures are the same, and it has Figure 2 the same technical effects as the touch display panel shown. Specifically, as Figure 5As shown, the orthographic projection of the black matrix 40 on the display panel 100 also covers the orthographic projection of the side surface 332 connected to the top surface 331 of the first structure 33 on the display panel 100. In this way, in the off-screen state, when external light shines on the touch display panel, the ambient light reflected through the internal structure of the touch display panel can be reduced, making the screen in the off-screen state darker and improving the contrast ratio.

[0116] Specifically, as Figure 5 shown, the distance c between the orthographic projection boundary of the black matrix 40 on the display panel 100 and the orthographic projection boundary of the inner wall of the second opening 201 on the display panel 100 can be 4 - 6 μm.

[0117] It should be noted that Figure 5 the color filter structures (R, G, B) in the touch display panel shown can also be in contact settings.

[0118] In some embodiments, the present disclosure also provides a touch display panel. As Figure 7 shown, Figure 7 the structure of the touch display panel shown is basically the same as that of Figure 2 shown. The difference between the two is only the structure of the first refractive index layer 30, and the structures of the other film layers are the same, and they have Figure 2 the same technical effects as the touch display panel shown. Specifically, as Figure 7 shown, the first refractive index layer 30 includes a convex structure 32 located in each sub-pixel region and a first structure 33 located in the spacer region. The first structure 33 covers the touch electrodes (81 / 82). The first refractive index layer 30 further includes a second structure 34 located in each sub-pixel region and between the convex structure 32 and the touch layer 200. The thickness of the second structure 34 is the same as that of the first structure 33, and the convex structure 32, the second structure 34, and the first structure 33 are an integral structure. In this way, the second structure 34 and the first structure 33 are equivalent to a flat layer under the convex structure 32. The first refractive index layer 30 can be fabricated using the half tone mask process, that is, a structure with a convex structure 32 is prepared in the sub-pixel region, and the second structure 34 and the first structure 33 between the convex structure 32 and the touch layer 200 are prepared in the sub-pixel region and the spacer region; then the black matrix 40 is prepared on the first structure 33 above the touch electrode region.

[0119] It should be noted that Figure 7 the color filter structures (R, G, B) in the touch display panel shown can also be in contact settings.

[0120] In some embodiments, the present disclosure also provides a touch display panel. As Figure 8 shown, Figure 8The structure of the touch display panel shown is the same as that of Figure 2 the structure shown. The difference between the two lies only in the structure of the second refractive index layer 50, and the structures of the other film layers are the same, and it has Figure 2 the same technical effects as the touch display panel shown. Specifically, as Figure 8 shown, the second refractive index layer 50 includes color filter structures (R, G, B) provided in one-to-one correspondence with the sub-pixel regions. The color filter structures (R, G, B) cover the top surface 321 of the convex structure 32 facing away from the display panel 100 and the side surface 322 connected to the top surface 321. Specifically, the color filter structures (R, G, B) are the same as the structures Figure 2 shown in the foregoing. Since the refractive index of the color filter structures (R, G, B) is generally 1.6 - 1.7, in this embodiment of the present disclosure, the color filter structures (R, G, B) are directly used as the low refractive index layer. In this way, when the color filter structures (R, G, B) directly cover the convex structure 32, a high-low refractive index interface can also be formed above the sub-pixel region, that is, a structure similar to a convex lens structure is formed, thereby improving the light extraction efficiency. Therefore, compared with Figure 2 the structure shown, the structure of this embodiment of the present disclosure Figure 8 shown can save Figure 2 the manufacturing of the second refractive index layer 50 in, can reduce one Mask, and reduce the manufacturing cost.

[0121] It should be noted that Figure 8 the orthographic projection of the black matrix 40 in the touch display panel shown on the display panel 100 can also cover the orthographic projection of the side surface 332 connected to the top surface 331 of the first structure 33 on the display panel 100.

[0122] In some embodiments, this embodiment of the present disclosure also provides a touch display panel, as Figure 9 shown, Figure 9 the structure of the touch display panel shown is the same as that of Figure 8 the structure shown. The difference between the two lies only in the structure of the second refractive index layer 50, and the structures of the other film layers are the same. It not only has Figure 2 the same technical effects as the touch display panel shown, but also can reduce one Mask. Specifically, as Figure 9 shown, adjacent color filter structures (R, G, B) are in contact with each other, and the orthographic projection of the contact boundary of the adjacent color filter structures (R, G, B) on the display panel 100 is located within the orthographic projection of the black matrix 40 on the display panel 100.

[0123] It should be noted that Figure 9The orthographic projection of the black matrix 40 in the touch display panel shown on the display panel 100 may also cover the orthographic projection of the side surface 332 connected to the top surface 331 of the first structure 33 on the display panel 100.

[0124] In some embodiments, the embodiments of the present disclosure also provide a touch display panel, as Figure 10 shown, Figure 10 the structure of the touch display panel shown is basically the same as that of Figure 8 the structure shown, the difference between the two is only the structure of the first refractive index layer 30, and the structures of the remaining film layers are the same. It not only has Figure 2 the same technical effects as the touch display panel shown, but also can reduce one Mask. Specifically, as Figure 10 shown, Figure 10 the structure of the first refractive index layer 30 in Figure 7 can refer to the structure of the first refractive index layer 30 shown.

[0125] It should be noted that Figure 10 the color filter structures (R, G, B) in the touch display panel shown may also be in contact setting.

[0126] In specific implementation, the above touch display panel provided by the embodiments of the present disclosure may further include other functional film layers well-known to those skilled in the art, which will not be elaborated here.

[0127] Based on the same utility model concept, the embodiments of the present disclosure also provide a manufacturing method of a touch display panel for manufacturing each touch display panel provided above, as Figure 11 shown, this manufacturing method may include:

[0128] S1101. Form a display panel, the display panel includes a display area, the display area includes a plurality of sub-pixel areas and a spacer area separating the plurality of sub-pixel areas from each other;

[0129] S1102. Form a touch layer on the light-emitting side of the display panel, the touch layer includes touch electrodes located in the display area and arranged around the sub-pixel areas;

[0130] S1103. Form a first refractive index layer on the side of the touch layer facing away from the display panel, the first refractive index layer includes convex structures located in each sub-pixel area and a first structure located in the spacer area, and the first structure covers the touch electrodes;

[0131] S1104. Form a black matrix on the side of the first structure facing away from the display panel, and the orthographic projection of the black matrix on the display panel covers the orthographic projection of the touch electrodes on the display panel;

[0132] S1105. Form a second refractive index layer on the side of the black matrix facing away from the display panel. The second refractive index layer covers at least the top surface of the convex structure facing away from the display panel and the side surface connected to the top surface. The refractive index of the first refractive index layer is greater than that of the second refractive index layer.

[0133] The following will Figure 7 describe in detail the manufacturing method of the touch display panel shown below, which specifically includes the following steps:

[0134] (1) As Figure 12A shown, form a display panel 100. The display panel 100 includes a driving backplane 1, a pixel defining layer 2, a light-emitting functional layer 3, and a packaging layer 4. The manufacturing methods, film layer materials, film layer thicknesses, etc. of these structures are the same as those in the prior art and will not be described in detail here.

[0135] (2) As Figure 12B shown, form a touch layer 200 on the light-emitting side of the display panel 100, that is, on the packaging layer 4. The touch layer 200 includes a touch buffer layer 5, a first metal layer 6, a touch insulating layer 7, and a second metal layer 8 that are stacked. The manufacturing methods, film layer materials, film layer thicknesses, etc. of these film layers are the same as those in the prior art and will not be described in detail here.

[0136] (3) As Figure 12C shown, form a first refractive index material film layer 30' with a refractive index greater than 1.8 on the side of the touch layer 200 facing away from the display panel 100.

[0137] (4) As Figure 12D shown, form a photoresist layer 500 on the side of the first refractive index material film layer 30' facing away from the display panel 100.

[0138] (5) As Figure 12E shown, pattern the photoresist layer 500 through a halftone mask process to form a first photoresist pattern 500' including a photoresist fully retained area 501, a photoresist semi-retained area 502, and a photoresist fully removed area (not shown). The photoresist fully retained area 501 corresponds at least to the sub-pixel area, the photoresist semi-retained area 502 corresponds at least to the spacer area, and the photoresist fully removed area corresponds at least to Figure 3 the area where the barriers (Dam1 and Dam2) in the non-display area BB in

[0139] (6) As Figure 3 shown, use the first photoresist pattern 500' as a mask to etch the first refractive index material film layer 30', and at least remove the first refractive index material film layer above the area where the barriers (Dam1 and Dam2) are located.

[0140] (7) As Figure 12FAs shown, the first photoresist pattern 500' is ashed to remove the photoresist in the photoresist semi-retained area 502 and thin the photoresist in the photoresist fully-retained area 501, forming the second photoresist pattern 500".

[0141] (8) As Figure 12G shown, using the second photoresist pattern 500" as a mask, the first refractive index material film layer 30 corresponding to the photoresist semi-retained area 502 is etched to form a convex structure 32 in the sub-pixel area, a second structure 34 in the sub-pixel area and between the convex structure 32 and the touch control layer 200, and a first structure 33 in the spacer area, forming a first refractive index layer 30 including the convex structure 32, the second structure 34 and the first structure 33.

[0142] (9) As Figure 12H shown, the second photoresist pattern 500" is removed.

[0143] (10) As Figure 12I shown, a black matrix 40 is formed on the side of the first refractive index layer 30 facing away from the display panel 100, and the orthographic projection of the black matrix 40 on the display panel 100 covers the orthographic projection of the touch control electrode on the display panel; the manufacturing method, film layer material, etc. of the black matrix are the same as those in the prior art and will not be elaborated here.

[0144] (11) As Figure 12J shown, a second refractive index layer 50 covering the display area AA is formed on the side of the black matrix 40 facing away from the display panel 100, and the refractive index of the first refractive index layer 30 is greater than the refractive index of the second refractive index layer 50.

[0145] (12) As Figure 12K shown, a color filter layer 60 is formed on the side of the second refractive index layer 50 facing away from the display panel 100, and the color filter layer 60 includes color filter structures (R, G, B) corresponding to the sub-pixel areas one by one.

[0146] (13) A touch control protection layer 400 is formed on the side of the color filter layer 60 facing away from the display panel 100, that is, the touch control display panel shown is formed. Figure 7 shown.

[0147] It should be noted that Figure 10 the manufacturing method of the touch control display panel shown is basically the same as the manufacturing method shown in Figure 7 , the difference is that when manufacturing the touch control display panel shown in Figure 10 , there is no need to manufacture the second refractive index layer 50 in Figure 7 , and the color filter structures (R, G, B) are used as the second refractive index layer 50.

[0148] It should be noted that Figure 2 the manufacturing method of the touch control display panel shown is the same asFigure 7 The manufacturing methods shown are basically the same, except that Figure 2 for the first refractive index layer 30 in the touch display panel shown, a common exposure and development process can be directly used, without the need to adopt a halftone mask process.

[0149] It should be noted that Figure 4 the manufacturing method of the touch display panel shown is basically the same as that of Figure 7 the manufacturing method shown, except that Figure 4 for the first refractive index layer 30 in the touch display panel shown, a common exposure and development process can be directly used, without the need to adopt a halftone mask process, and Figure 4 the adjacent color filter structures (R, G, B) in

[0150] It should be noted that Figure 5 the manufacturing method of the touch display panel shown is basically the same as that of Figure 7 the manufacturing method shown, except that Figure 5 for the first refractive index layer 30 in the touch display panel shown, a common exposure and development process can be directly used, without the need to adopt a halftone mask process, and Figure 5 the black matrix 40 in

[0151] It should be noted that Figure 8 the manufacturing method of the touch display panel shown is basically the same as that of Figure 7 the manufacturing method shown, except that Figure 8 for the first refractive index layer 30 in the touch display panel shown, a common exposure and development process can be directly used, without the need to adopt a halftone mask process, and when manufacturing Figure 8 the touch display panel shown, there is no need to manufacture Figure 7 the second refractive index layer 50 in

[0152] It should be noted that Figure 9 the manufacturing method of the touch display panel shown is basically the same as that of Figure 7 the manufacturing method shown, except that Figure 9 for the first refractive index layer 30 in the touch display panel shown, a common exposure and development process can be directly used, without the need to adopt a halftone mask process, and when manufacturing Figure 9 the touch display panel shown, there is no need to manufacture Figure 7 the second refractive index layer 50 in Figure 9 and the adjacent color filter structures (R, G, B) in

[0153] Based on the same utility model concept, the embodiment of the present disclosure also provides a display device, including the above-mentioned touch display panel provided by the embodiment of the present disclosure. The principle of solving the problem by the display device is similar to that of the above-mentioned touch display panel, so the implementation of the display device can refer to the implementation of the above-mentioned touch display panel, and the repeated parts will not be repeated here.

[0154] In a specific implementation, the display device provided in the embodiment of the present disclosure may further include a cover plate covering the touch display panel. Specifically, the cover plate may be a rigid cover plate or a flexible cover plate.

[0155] In specific implementation, the above-mentioned display device provided in the embodiment of the present disclosure may be a full-screen display device, or may also be a flexible display device, etc., which is not limited here.

[0156] In a specific implementation, the display device provided in the embodiment of the present disclosure may be as follows: Figure 13 The full-screen mobile phone shown. Of course, the display device provided in the embodiment of the present disclosure can also be any product or component with a display function, such as a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device should be understood by ordinary technicians in the field, and will not be repeated here, nor should they be used as a limitation to the present disclosure.

[0157] The touch display panel and display device provided by the embodiments of the present disclosure, on the one hand, utilize the refractive index difference between the first refractive index layer with a high refractive index and the second refractive index layer with a low refractive index, so that the light emitted by the light-emitting unit is refracted at the interface between the first refractive index layer and the second refractive index layer, so that more light is emitted from the corresponding sub-pixel area, thereby improving the light extraction efficiency; on the other hand, the first refractive index layer of the present disclosure is formed before the black matrix. Compared with the first refractive index layer being made after the black matrix, the protruding structure of the present disclosure can avoid the opening of the black matrix, that is, when the protruding structure of the present disclosure is made, there is no influence of the black matrix pattern around it, and the slope angle morphology around the protruding structure can be better controlled, which is beneficial to improving the light extraction efficiency, thereby reducing the L-Decay of the touch display panel and reducing problems such as color deviation.

[0158] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0159] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if these modifications and variations of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these changes and modifications.

Claims

1. A touch display panel, wherein, Comprising: A display panel, the display panel includes a display area, the display area includes a plurality of sub-pixel areas and a spacer area that separates the plurality of sub-pixel areas from each other; A touch layer, located on the light-emitting side of the display panel, the touch layer includes touch electrodes located in the display area and disposed around the sub-pixel areas; A first refractive index layer, located on the side of the touch layer away from the display panel, the first refractive index layer includes raised structures located in each of the sub-pixel areas and a first structure located in the spacer area, the first structure covering the touch electrodes; A black matrix, located on the side of the first structure away from the display panel, the orthographic projection of the black matrix on the display panel covers the orthographic projection of the touch electrodes on the display panel; A second refractive index layer, located on the side of the black matrix away from the display panel, the second refractive index layer covers at least the top surface of the raised structure away from the display panel and the side surface connected to the top surface, and the refractive index of the first refractive index layer is greater than the refractive index of the second refractive index layer.

2. The touch display panel according to claim 1, wherein The orthographic projection of the black matrix on the display panel covers the orthographic projection of the top surface of the first structure away from the display panel on the display panel.

3. The touch display panel according to claim 2, wherein, The orthographic projection of the black matrix on the display panel also covers the orthographic projection of the side surface connected to the top surface of the first structure on the display panel.

4. The touch display panel according to any one of claims 1 to 3, wherein, The cross-section of the raised structure is a regular trapezoid.

5. The touch display panel according to claim 4, wherein, The cross-section of the first structure is a regular trapezoid, the first structure is spaced apart from the raised structure, and the thickness of the first structure is the same as the thickness of the raised structure.

6. The touch display panel according to any one of claims 1-3, wherein, The first refractive index layer further includes a second structure located in each of the sub-pixel areas and between the raised structure and the touch layer, the thickness of the second structure is the same as the thickness of the first structure, and the raised structure, the second structure and the first structure are an integral structure.

7. The touch display panel according to any one of claims 1-3, wherein, The orthographic projection of the second refractive index layer on the display panel covers the display area of the display panel.

8. The touch display panel according to claim 7, wherein, Further included is a color filter layer located on the side of the second refractive index layer away from the display panel, the color filter layer includes color filter structures provided in one-to-one correspondence with the sub-pixel areas.

9. The touch display panel according to claim 8, wherein, The refractive index of the first refractive index layer is greater than 1.8, and the refractive index of the second refractive index layer is 1.4 to 1.

5.

10. The touch display panel according to any one of claims 1-3, wherein, The second refractive index layer includes color filter structures provided in one-to-one correspondence with the sub-pixel areas, the color filter structures covering the top surface of the raised structure away from the display panel and the side surface connected to the top surface.

11. The touch display panel according to claim 10, wherein, The refractive index of the first refractive index layer is greater than 1.8, and the refractive index of the second refractive index layer is 1.6 to 1.

7.

12. The touch display panel according to claim 8, 9 or 11, wherein, The black matrix encloses a plurality of first openings corresponding to the sub-pixel areas one by one, and each of the color filter structures is located in the corresponding first opening area.

13. The touch display panel according to claim 8, 9 or 11, wherein, Adjacent color filter structures are in contact with each other, and the contact boundary of adjacent color filter structures is located within the orthographic projection of the black matrix on the display panel in the orthographic projection on the display panel.

14. The touch display panel according to claim 8, 9 or 11, wherein, Further included is a touch protection layer located on the side of the color filter structure away from the display panel.

15. The touch display panel according to claim 1, wherein, The display panel further includes a non-display area surrounding the display area. The non-display area includes at least one barrier rib disposed around the display area. The first refractive index layer is located at the edge of the non-display area and terminates at the side of the barrier rib closest to the display area facing the display area. The black matrix is located at the edge of the non-display area and terminates at the side of the barrier rib closest to the display area facing the display area.

16. The touch display panel according to claim 15, wherein, The black matrix is disposed substantially flush with the first refractive index layer at the edge of the non-display area.

17. The touch display panel according to claim 1, wherein, The display panel includes: a driving backplane, and a pixel defining layer located between the driving backplane and the touch layer; the pixel defining layer includes a plurality of second openings corresponding to the sub-pixel areas one by one; The orthographic projection boundary of the convex structure on the display panel is located within the orthographic projection of the pixel defining layer on the display panel.

18. The touch display panel according to claim 17, wherein, The distance between the orthographic projection boundary of the convex structure on the display panel and the orthographic projection boundary of the inner wall of the second opening on the display panel is 1 to 2 μm.

19. The touch display panel according to claim 17, wherein, The display panel further includes: a light-emitting functional layer located between the pixel defining layer and the touch layer, and a packaging layer located between the light-emitting functional layer and the touch layer; The light-emitting functional layer includes a plurality of light-emitting units, the light-emitting units are located within the second openings, and the light-emitting units correspond to the second openings one by one.

20. The touch display panel as claimed in claim 1, wherein, The touch layer includes a touch buffer layer, a first metal layer, a touch insulating layer, and a second metal layer stacked in sequence, and the touch buffer layer is close to the display panel; The second metal layer includes the touch electrodes, the touch electrodes include a plurality of first touch electrodes arranged along a first direction and a plurality of second touch electrodes arranged along a second direction, and the first direction intersects the second direction; The first touch electrodes include a plurality of first electrode blocks arranged along the second direction, and adjacent two of the first electrode blocks are electrically connected through a first connection portion. The second touch electrodes include a plurality of second electrode blocks arranged along the first direction, and adjacent two of the second electrode blocks are electrically connected through a second connection portion; The first connection portion is located in the second metal layer, and the second connection portion is located in the first metal layer; The first electrode blocks, the second electrode blocks, the first connection portion, and the second connection portion are respectively grid-like structures arranged around the sub-pixel areas.

21. A display device, wherein, Including the touch display panel according to any one of claims 1-20.

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