Touch display panel and touch display apparatus

Abstract

A touch display panel and a display apparatus, relating to the technical field of touch control. The touch display panel comprises a display substrate and a touch layer. The display substrate comprises a plurality of light-emitting devices distributed in the row direction and the column direction. The touch layer is arranged on a light exit side of the display substrate and comprises an electrode layer and a first light absorption layer. The electrode layer is divided into a plurality of electrode blocks by means of electrode gaps. The first light absorption layer covers the surface of the electrode layer and is provided with light absorption gaps overlapping the electrode gaps and first light-transmitting holes overlapping the light-emitting devices. The light absorption gaps extend in the extension direction of the electrode gaps. The present application can reduce the reflection of ambient light.

Description

Touch display panel and touch display device Technical Field

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

[0002] Touch display panels have been widely used in mobile phones, tablet computers and other terminal devices. While displaying images, they can also realize human-computer interaction through touch operation. In the prior art, touch display panels reflect ambient light, which affects the display effect.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field.

[0004] Summary of the Invention

[0005] The present disclosure provides a touch display panel and a touch display device.

[0006] According to one aspect of the present disclosure, a touch display panel is provided, comprising:

[0007] A display substrate comprising a plurality of light emitting devices distributed along row and column directions;

[0008] The touch layer is arranged on the light-emitting side of the display substrate and includes an electrode layer and a first light-absorbing layer; the electrode layer is divided into a plurality of electrode blocks by an electrode gap; the first light-absorbing layer covers the surface of the electrode layer and is provided with a light-absorbing gap overlapping with the electrode gap and a first light-transmitting hole overlapping with the light-emitting device, and the light-absorbing gap extends along the extension direction of the electrode gap.

[0009] In an exemplary embodiment of the present disclosure, the orthographic projection of the light absorption gap on the display substrate is located within the orthographic projection of the electrode gap on the display substrate and is spaced from a boundary of the orthographic projection of the electrode gap on the display substrate.

[0010] In an exemplary embodiment of the present disclosure, there are multiple light absorption gaps, which are distributed along the width direction of the electrode gap; the orthographic projection of each light absorption gap on the display substrate is located within the orthographic projection of the electrode gap on the display substrate.

[0011] In an exemplary embodiment of the present disclosure, at least two regions of a boundary of an orthographic projection of the light absorption gap on the display substrate are at different distances from a boundary of an orthographic projection of the electrode gap on the display substrate.

[0012] In an exemplary embodiment of the present disclosure, a center line of an orthographic projection of the light absorption gap on the display substrate and a center line of an orthographic projection of the electrode gap on the display substrate are spaced apart from each other.

[0013] In an exemplary embodiment of the present disclosure, the electrode layer further comprises:

[0014] a dummy electrode disposed in the electrode gap and extending along an extension direction of the electrode gap; the dummy electrode divides the electrode gap into a first gap and a second gap;

[0015] The light absorption gap includes a first light absorption gap overlapping the first gap and a second light absorption gap overlapping the second gap.

[0016] In an exemplary embodiment of the present disclosure, the electrode layer is a mesh structure formed by intersecting grid lines, and the first light-transmitting holes overlap with mesh holes of the mesh structure;

[0017] The electrode gap is formed by an electrode fracture that cuts off part of the grid lines; the first light absorption layer forms a light absorption fracture in an area corresponding to the electrode fracture, and the light absorption gap is formed by the light absorption fracture.

[0018] In an exemplary embodiment of the present disclosure, each of the light-emitting devices includes at least two light-emitting devices of different sizes, and the light-emitting devices of different sizes emit different colors; each of the meshes includes at least two meshes of different sizes, and one mesh overlaps with one light-emitting device;

[0019] Among the meshes overlapping the two light-emitting devices of different sizes, the mesh overlapping the larger light-emitting device is larger than the mesh overlapping the smaller light-emitting device; the light-absorbing gap at least intercepts the two meshes of different sizes.

[0020] In an exemplary embodiment of the present disclosure, the touch display panel has a display area and a peripheral area outside the display area, the peripheral area has a fan-out area distributed along the column direction with the display area; the fan-out area has a binding portion; at least part of the electrode blocks are located in the display area;

[0021] The electrode layer further includes a touch lead connected to the electrode block, the touch lead extends to the fan-out area and is connected to the binding portion; the first light absorption layer is disconnected in a region corresponding to between two adjacent touch leads.

[0022] In an exemplary embodiment of the present disclosure, the first light absorption layer covers a surface of the touch lead away from the display substrate and a sidewall of the touch lead.

[0023] In an exemplary embodiment of the present disclosure, each of the electrode blocks includes a plurality of first electrode blocks and a plurality of second electrode blocks; the touch layer includes a plurality of first touch electrodes spaced apart along the column direction and a plurality of second touch electrodes spaced apart along the row direction; the first touch electrodes and the second touch electrodes are insulated at the intersection; the first touch electrode includes a plurality of the first electrode blocks, and the second touch electrode includes a plurality of the second electrode blocks; the electrode gap separates the first electrode block and the second electrode block.

[0024] In an exemplary embodiment of the present disclosure, a first touch electrode includes a plurality of electrode rows distributed and connected along the column direction, and an electrode row includes a plurality of first electrode blocks distributed along the row direction and an electrode connecting portion connecting two adjacent first electrode blocks;

[0025] The second touch electrodes include a plurality of electrode columns distributed and connected along the row direction, and the electrode columns include a plurality of second electrode blocks distributed at intervals along the column direction and a transfer bridge connecting two adjacent second electrode blocks;

[0026] The first touch electrode and the second touch electrode cross the transfer bridge via the electrode connecting portion, and the electrode connecting portion and the transfer bridge are located in different layers that are insulated from each other.

[0027] In an exemplary embodiment of the present disclosure, the touch layer further includes:

[0028] A transfer layer is provided on the light-emitting side of the display substrate; the transfer bridge is located on the transfer layer;

[0029] an isolation layer covering the transfer layer; the electrode layer is provided on a surface of the isolation layer away from the display substrate; and the electrode connection portion is located on the electrode layer;

[0030] At least one of the touch leads includes a first wire body located in the transfer layer and a second wire body located in the electrode layer, and the first wire body and the second wire body are connected via a contact hole passing through the isolation layer.

[0031] In an exemplary embodiment of the present disclosure, the touch layer further includes:

[0032] The touch-sensitive flat layer covers the first light-absorbing layer and fills the first light-transmitting hole; the refractive index of the touch-sensitive flat layer is greater than the refractive index of the first light-absorbing layer.

[0033] In an exemplary embodiment of the present disclosure, the touch display panel further includes:

[0034] A second light absorption layer is provided on a surface of the touch flat layer away from the display substrate and has a plurality of second light-transmitting holes, wherein a second light-transmitting hole overlaps with a first light-transmitting hole;

[0035] A transparent flat layer covers the second light absorbing layer and fills the second light-transmitting hole; the refractive index of the transparent flat layer is greater than the refractive index of the second light absorbing layer.

[0036] In an exemplary embodiment of the present disclosure, the display substrate includes:

[0037] Driver backplane;

[0038] a pixel definition layer, which is provided on the same side of the driving backplane as the light-emitting devices and has pixel openings defining the range of each light-emitting device;

[0039] The orthographic projection of the pixel opening on the driving backplane is located within the orthographic projection of the first light-transmitting hole on the driving backplane, and the orthographic projection of the first light-transmitting hole on the driving backplane is located within the orthographic projection of the second light-transmitting hole on the driving backplane.

[0040] In an exemplary embodiment of the present disclosure, the touch display panel further includes:

[0041] The reflection reduction layer is arranged on the light-emitting side of the display substrate, and the touch layer is arranged on the side of the reflection reduction layer away from the display substrate; the reflection reduction layer includes multiple filter parts, one filter part overlaps with one light-emitting device, and the color of any filter part is the same as the light-emitting color of the light-emitting device overlapping with it.

[0042] In an exemplary embodiment of the present disclosure, the display substrate includes:

[0043] Driver backplane;

[0044] a pixel definition layer, which is provided on the same side of the driving backplane as the light-emitting devices and has pixel openings defining the range of each light-emitting device;

[0045] The reflective reduction layer further comprises:

[0046] A reflection reduction and light absorption layer is provided on the light-emitting side of the display substrate and has a plurality of reflection reduction holes, wherein any of the light filtering portions is at least partially confined within a reflection reduction hole; and a reflection reduction hole overlaps with a pixel opening;

[0047] An orthographic projection of the pixel opening on the driving backplane is located within an orthographic projection of the anti-reflection hole on the driving backplane.

[0048] In an exemplary embodiment of the present disclosure, a distance between a boundary of an orthographic projection of the pixel opening on the driving backplane and a boundary of an orthographic projection of the anti-reflection hole on the driving backplane is 0.5 μm-1 μm.

[0049] According to one aspect of the present disclosure, a touch display device is provided, comprising any one of the above-mentioned touch display panels.

[0050] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0052] FIG1 is a top view of an embodiment of a touch display panel disclosed herein.

[0053] FIG2 is a schematic top view of a touch layer in an embodiment of a touch display panel disclosed herein.

[0054] FIG3 is a partial enlarged view of a touch layer in an embodiment of a touch display panel disclosed herein.

[0055] FIG4 is a partial cross-sectional view of an embodiment of a touch display panel disclosed herein.

[0056] FIG5 is a partial enlarged view of the first embodiment of the touch display panel disclosed herein.

[0057] FIG6 is a top view of the electrode layer in FIG5 .

[0058] FIG. 7 is a top view of the first light absorbing layer in FIG. 5 .

[0059] FIG. 8 is a cross-sectional view taken along line AA of an embodiment of FIG. 5 .

[0060] FIG. 9 is a BB cross-sectional view of an embodiment of FIG. 5 .

[0061] FIG. 10 is a cross-sectional view taken along line AA of another embodiment of FIG. 5 .

[0062] FIG11 is a BB cross-sectional view of another embodiment of FIG5 .

[0063] FIG12 is a partially enlarged view of a second embodiment of the touch display panel disclosed herein.

[0064] FIG13 is a top view of the electrode layer in FIG12 .

[0065] FIG14 is a top view of the first light absorbing layer in FIG12 .

[0066] FIG15 is a partially enlarged view of a third embodiment of the touch display panel disclosed herein.

[0067] FIG16 is a top view of the first light absorbing layer in FIG15 .

[0068] FIG17 is a partially enlarged view of the fourth embodiment of the touch display panel disclosed herein.

[0069] FIG18 is a top view of the first light absorbing layer in FIG17 .

[0070] 19 to 22 are schematic diagrams of the first to fourth light absorption gaps, respectively.

[0071] FIG23 is a partial enlarged view of the touch leads in one embodiment of the touch display panel disclosed herein.

[0072] FIG24 is a CC cross-sectional view of FIG23 . DETAILED DESCRIPTION

[0073] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed description will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0074] While overlapping terms such as "above" and "below" are used in this specification to describe the overlapping relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations depicted in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "above" would become the component "below." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0075] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0076] The row direction X and column direction Y herein are two intersecting directions. In the drawings of this disclosure, the row direction X is horizontal and the column direction Y is vertical, and the two are perpendicular to each other. However, this is not limiting. The row direction X and the column direction Y may also be non-perpendicular. Furthermore, those skilled in the art will appreciate that, as the display panel rotates, the actual orientations of the row direction X and the column direction Y may change, but their relative positions remain unchanged.

[0077] The "overlap" of feature A and feature B in this article means that the orthographic projection of feature A on a plane and the orthographic projection of feature B on the same plane at least partially overlap; the plane can be the surface of a display substrate, a driving backplane, a substrate, etc.

[0078] In this article, A and B are "set in the same layer" means that A and B belong to different continuous or disconnected regions in the same film layer, and each region can be formed at the same time; A and B are located in "different layers" means that A and B belong to different film layers, and different film layers refer to film layers that are not formed at the same time.

[0079] Embodiments of the present disclosure provide a touch display panel, as shown in FIG1 . The touch display panel includes a display area AA and a peripheral area WA located outside the display area AA. The peripheral area WA can be a continuous annular area surrounding the display area AA, or it can be a discontinuous area surrounding the display area AA. For example, the peripheral area WA can be located on both sides of the display area AA. The display area AA can be configured to emit light to display images, while the peripheral area WA does not emit light.

[0080] The peripheral area WA is a continuous annular region surrounding the display area AA. It may include a fan-out area FA arranged along the column direction Y with respect to the display area AA. For example, the peripheral area WA may be formed by the fan-out area FA and a U-shaped peripheral area. The fan-out area FA has a binding portion BA, which may include multiple conductive contacts. The conductive contacts may be connected to the driver circuit board via a flexible circuit board or directly to the driver circuit board. One of the driver circuit board, the flexible circuit board, and the fan-out area FA may include a display chip that controls image display.

[0081] In some embodiments, the fan-out area FA may include a bending region extending along the row direction X. The bending region is a flexible, bendable structure, and the binding portion BA is located on the side of the bending region away from the display area AA. By bending the bending region, the fan-out area FA can be bent toward the backlight side of the touch display panel, i.e., the side opposite the light-emitting direction; thereby, the fan-out area FA can be connected to the binding portion BA on the backlight side of the touch display panel.

[0082] As shown in FIG8 to FIG11 , the touch display panel may include a display substrate PNL for displaying images, which may include a driving backplane BP and a plurality of light-emitting devices LD provided on one side of the driving backplane BP, wherein:

[0083] The driver backplane (BP) includes a driver circuit that drives the light-emitting devices (LD) to emit light, thereby displaying an image. In some embodiments of the present disclosure, the driver backplane (BP) may include a substrate and a circuit layer located on one side of the substrate. The substrate may be a flat plate made of either a rigid material such as glass or a flexible material such as polyimide. The substrate may be a single-layer or multi-layer structure.

[0084] The circuit layer includes the aforementioned drive circuit. For example, the drive circuit may include a pixel circuit located in the display area AA and a peripheral circuit located in the peripheral area WA. The pixel circuit may have a 3T1C, 7T1C, 8T1C, or other structure, as long as it can drive the light-emitting device LD to emit light. There is no specific limitation on its structure. nTmC indicates that a pixel circuit includes n thin-film transistors (represented by the letter "T") and m capacitors (represented by the letter "C"). The number of pixel circuits may be the same as the number of light-emitting devices LD, and each light-emitting device LD is connected in a one-to-one correspondence. Of course, the same pixel circuit may also be connected to multiple light-emitting devices LD, and there is no specific limitation on this.

[0085] The peripheral circuit is connected to the pixel circuit and is used to input a drive signal to the pixel circuit to control the light emitting device LD to emit light. The peripheral circuit may include a gate drive circuit and a light emitting control circuit. Of course, it may also include other circuits. The specific structure of the peripheral circuit is not particularly limited here.

[0086] The aforementioned driving circuit may include multiple thin-film transistors and capacitors. The thin-film transistors may be top-gate or bottom-gate thin-film transistors. Each thin-film transistor may include an overlapping active layer and a gate electrode. The active layers of each thin-film transistor may be disposed in the same semiconductor layer. Alternatively, the active layers may be disposed in multiple semiconductor layers, with the active layers of different thin-film transistors located in different semiconductor layers. The semiconductor layer may be made of polycrystalline silicon or a metal oxide, without particular limitation.

[0087] The circuit layer may also include traces for transmitting signals connected to the pixel circuits and peripheral circuits. For example, a column of pixel circuits may be connected to a data line extending along the column direction Y, and data signals may be transmitted through the data line. The data line may extend to the fan-out area FA and be connected to the binding part BA. The gate drive circuit and the light-emitting control circuit may be connected to multiple traces such as the clock signal line. These traces may also extend to the fan-out area FA and be connected to the binding part BA.

[0088] Taking the top-gate thin-film transistor as an example, in some embodiments, the circuit layer may include a semiconductor layer, a first gate insulation layer, a first gate layer, a second gate insulation layer, a second gate layer, an interlayer dielectric layer, a first source and drain layer, a passivation layer, a first flat layer, a second source and drain layer, and a second flat layer stacked in sequence along the direction away from the substrate. The active layer of the thin-film transistor is located in the semiconductor layer, the gate is located in the first gate layer, and the two plates of the capacitor are located in the first gate layer and the second gate layer. The first source and drain layer and the second source and drain layer are used to connect at least part of the thin-film transistors and between the thin-film transistors and the capacitors, and are used to transmit driving signals. The type of driving signal and the specific pattern of each film layer depend on the specific composition of the driving circuit and are not specifically limited here.

[0089] As shown in Figures 8-11 , the light-emitting device LD can be an OLED (organic light-emitting diode) using organic light-emitting materials, or a Mini LED (sub-millimeter light-emitting diode, 100μm-200μm in size), a Micro LED (micro light-emitting diode, 100μm or less in size), or an LED (light-emitting diode, 200μm or greater in size) using inorganic light-emitting materials. No particular limitation is imposed herein, as long as it can emit light. The light-emitting device LD is located within the display area AA. Of course, some light-emitting devices LD may also be located in the peripheral area WA. However, the light-emitting devices LD located in the peripheral area WA may be floating and non-emitting.

[0090] Taking the light-emitting device LD as an example of an OLED, the light-emitting device LD may include a first electrode ANO, a light-emitting layer EL, and a second electrode CAT stacked in sequence in a direction away from the driving backplane BP. By applying an electrical signal to the first electrode ANO and the second electrode CAT, the light-emitting layer EL can be stimulated to emit light. The specific light-emitting principle will not be described in detail here. The first electrode ANO can be used as an anode, and the second electrode CAT can be used as a cathode. The materials of the two include conductive materials such as metals and metal oxides. The light-emitting layer EL may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer stacked in sequence in a direction away from the driving backplane BP. Of course, other structures can also be used as long as they can cooperate with the first electrode ANO and the second electrode CAT to emit light.

[0091] The light-emitting device LD may adopt a top-emitting structure, that is, the first electrode ANO may adopt a reflective structure, while the second electrode CAT is a light-transmitting structure, so that the light-emitting device LD emits light in a direction away from the driving backplane BP; in this case, the light-emitting side of the display substrate PNL is the side of the light-emitting device LD away from the driving backplane BP, and the backlight side is the side of the driving backplane BP away from the light-emitting device LD. Alternatively, the light-emitting device LD may also adopt a bottom-emitting structure, that is, the second electrode CAT may adopt a reflective structure; while the first electrode ANO is a light-transmitting structure, so that the light-emitting device LD emits light toward the driving backplane BP; in this case, the light-emitting side of the display substrate PNL is the side of the driving backplane BP away from the light-emitting device LD, and the backlight side is the side of the light-emitting device LD away from the driving backplane BP. This article only takes the light-emitting device LD with a top-emitting structure as an example for explanation.

[0092] It should be noted that the above-mentioned reflective structure and light-transmitting structure of the first electrode ANO and the second electrode CAT do not mean that the reflectivity and transmittance reach 100%. The light-transmitting structure may have a certain reflective effect, and the reflective structure may also have a certain transmittance.

[0093] As shown in Figures 8-11 , the display substrate may further include a pixel definition layer (PDL) separating the light-emitting devices LD. The pixel definition layer (PDL) may be disposed on the same side of the driving backplane BP as the light-emitting devices LD. For example, the pixel definition layer (PDL) may be disposed on a surface of the second planar layer away from the substrate, along with the first electrodes ANO. The pixel definition layer (PDL) is thicker than the first electrodes ANO and covers a portion of each first electrode ANO. The pixel definition layer (PDL) has a pixel opening (PH) that exposes each first electrode ANO, with each pixel opening (PH) exposing one first electrode ANO.

[0094] The light-emitting layer EL and the second electrode CAT are sequentially stacked on the first electrode ANO within the pixel opening PH. In some embodiments, the light-emitting layer EL has a discontinuous structure, with the light-emitting layer EL of each light-emitting device LD independently spaced apart. This allows different light-emitting devices LD to emit different colors. The second electrode CAT has a continuous, single-layer structure, with the portion of the second electrode CAT located within the pixel opening PH covering the light-emitting layer EL. The portion of the second electrode CAT located outside the pixel opening PH may also cover the pixel definition layer PDL. The combined thickness of the light-emitting layer EL and the second electrode CAT is less than the thickness of the pixel definition layer PDL, resulting in the second electrode CAT being recessed within the pixel opening PH.

[0095] The shape and size of the light-emitting device LD are both defined by the pixel opening PH. The range of the light-emitting device LD is the range of the pixel opening PH, and the size of the light-emitting device LD is the size of the pixel opening PH. Furthermore, each light-emitting device LD includes at least two light-emitting devices LD of different sizes, i.e., two light-emitting devices LD of different sizes; the light-emitting devices LD of different sizes emit different colors. Furthermore, the light-emitting device LD can be divided into multiple light-emitting units. Each light-emitting unit can include at least three light-emitting devices LD, and at least three light-emitting devices LD in the same light-emitting unit emit different colors. For example, a light-emitting unit includes three light-emitting devices LD: a first light-emitting device that emits red light, a second light-emitting device that emits blue light, and a third light-emitting device that emits green light. The orthographic projections of the three light-emitting devices LD on the driver backplane BP are all rectangular, and the orthographic projections of the first and second light-emitting devices are larger than the orthographic projection of the third light-emitting device. The orthographic projections of the first and second light-emitting devices can be the same or different. For example, the orthographic projection of the first light-emitting device is larger than the orthographic projection of the second light-emitting device.

[0096] As shown in Figures 8 to 11, the touch display panel further includes an encapsulation layer TFE, which can cover each light-emitting device LD to block external moisture and oxygen and prevent the light-emitting device LD from being corroded. In some embodiments of the present disclosure, the encapsulation layer TFE can be a thin film encapsulation method, which can include a first inorganic layer CVD1, an organic layer IJP, and a second inorganic layer CVD2, wherein:

[0097] The first inorganic layer CVD1 can cover each light-emitting device LD. Specifically, the first inorganic layer CVD1 can cover the surface of the second electrode CAT away from the driving backplane BP. For a discontinuous second electrode CAT, the first inorganic layer CVD1 can also cover the area of ​​the pixel definition layer PDL not covered by the second electrode CAT. The thickness of the first inorganic layer CVD1 is less than that of the pixel definition layer PDL and can be recessed at the pixel opening PH. The material of the first inorganic layer CVD1 can include an inorganic insulating material such as silicon nitride and silicon oxide.

[0098] The organic layer IJP may be disposed on the surface of the first inorganic layer CVD1 away from the driving backplane BP. The boundary of the orthographic projection of the organic layer IJP on the driving backplane BP may be located in the peripheral area WA to ensure that the organic layer IJP can cover each light emitting device LD.

[0099] The second inorganic layer CVD2 can cover the organic layer IJP and the first inorganic layer CVD1 not covered by the organic layer IJP. The second inorganic layer CVD2 can block the intrusion of water and oxygen, and achieve planarization through the organic layer IJP, which has fluidity before curing. The second inorganic layer CVD2 can be made of inorganic insulating materials such as silicon nitride and silicon oxide.

[0100] The second electrode CAT and other film layers of the display substrate PNL reflect ambient light, thereby affecting the display effect. To this end, in some embodiments of the present disclosure, the touch display panel may further include a low-reflection layer (RL), which may be disposed on the light-emitting side of the display substrate PNL, i.e., the side of the encapsulation layer TFE away from the driver backplane BP. For example, the low-reflection layer RL may be disposed on the surface of the second inorganic layer CVD2 away from the driver backplane BP. Of course, other film layers may also be disposed between the low-reflection layer RL and the encapsulation layer TFE. The low-reflection layer RL can reduce ambient light reflected by the second electrode CAT and other film layers in the display substrate PNL, thereby reducing interference with light emitted by the light-emitting device LD and improving the display effect.

[0101] As shown in Figures 8-11, in some embodiments of the present disclosure, the filtering effect of the filter material can be utilized to absorb external ambient light and ambient light reflected by the second electrode CAT, thereby reducing reflection of ambient light. The anti-reflection layer RL may include multiple filter sections CF, each of which transmits monochromatic light while absorbing light of other colors. Furthermore, a filter section CF can overlap with a light-emitting device LD, and the color of any filter section CF is the same as the color of the light-emitting device LD with which it overlaps, ensuring that light emitted by each light-emitting device LD can be emitted through the overlapping filter section CF. The filtering effect of the filter section CF absorbs light of a different color from the ambient light, reducing the amount of ambient light that reaches reflective layers such as the second electrode CAT. Furthermore, the filter section CF can also absorb a portion of the ambient light reflected by layers such as the second electrode CAT, thereby reducing reflection of ambient light and improving the display effect.

[0102] The anti-reflection layer RL may also include a light-absorbing layer BM1, which can be disposed on the light-exiting side of the display substrate PNL and on the same surface as the filter CF. The anti-reflection layer BM1 can be made of a black light-absorbing material. For example, it can be made of a resin mixed with carbon black, thereby absorbing light. The anti-reflection layer BM1 has multiple anti-reflection holes BH1. Each filter CF is at least partially confined within a hole BH1. This means that each hole BH1 is filled with a filter CF in a one-to-one correspondence. The anti-reflection layer BM1 defines the position of each filter CF and prevents light from passing between adjacent filter CFs. The thickness of the filter CF and the depth of the anti-reflection holes BH1 can be the same or different, and are not specifically limited here. A single anti-reflection hole BH1 can overlap with a pixel opening PH, allowing light emitted by a light-emitting device LD to exit through the overlapping filter CF.

[0103] Furthermore, as shown in Figures 8 and 10, in order to prevent the anti-reflection light-absorbing layer BM1 from blocking the light-emitting device LD, the orthographic projection of the pixel opening PH on the driving backplate BP can be located within the orthographic projection of a anti-reflection hole BH1 on the driving backplate BP. For example, the boundary of the orthographic projection of the pixel opening PH on the driving backplate BP is located inside the boundary of the orthographic projection of the anti-reflection hole BH1 on the driving backplate BP, and the distance between the two boundaries is 0.5μm-1μm, that is, not less than 0.5μm and not more than 1μm. Of course, the boundary of the orthographic projection of the pixel opening PH on the driving backplate BP can also coincide with the boundary of the orthographic projection of the anti-reflection hole BH1 on the driving backplate BP.

[0104] Furthermore, as shown in Figures 8-11 , the anti-reflection layer RL may further include a anti-reflection planarization layer (ROC), which may cover the filter portion CF and the anti-reflection light-absorbing layer BM1 and is used to achieve planarization to facilitate stacking of other layers thereon. The ROC may be made of a material such as a transparent optical adhesive, and is not specifically limited herein.

[0105] In the above-described embodiment, the anti-reflection layer RL performs a anti-reflection function through the filter portion CF, eliminating the need for a thick circular polarizer to achieve this function, thereby reducing the overall thickness of the touch display panel. Of course, the embodiments of the present disclosure do not preclude the use of a circular polarizer in the anti-reflection layer RL. The specific structure and principle of the circular polarizer will not be described in detail here.

[0106] In addition, in other embodiments of the present disclosure, the aforementioned anti-reflection layer RL may not be provided, that is, a special film layer may be used to reduce the reflection of ambient light, and the display effect may be improved by increasing the display brightness.

[0107] As shown in FIG8 to FIG11 , the touch display panel may further include a touch layer TEL, which may be provided on the light-emitting side of the display substrate PNL. The touch layer TEL may include an electrode layer TMB, wherein:

[0108] As shown in Figures 2, 3, and 6, the electrode layer TMB is divided into multiple electrode blocks TB by electrode gaps TG. At least some of the electrode blocks TB are distributed along the row direction X and the column direction Y. The electrode blocks TB are used to sense touch operations. At least some of the electrode blocks TB are located within the display area AA, which is both the area for displaying images and the area for touch control. The electrode layer TMB may also include touch leads TL connected to the electrode blocks TB. The touch leads TL extend to the fan-out area FA and connect to the binding portion BA for transmitting touch signals.

[0109] The touch layer TEL may adopt a capacitive touch structure, and the capacitive touch structure may be a mutual capacitance structure or a self-capacitance structure, as exemplified below:

[0110] Taking a self-capacitive structure as an example, in some embodiments, each electrode block TB can function as a touch electrode. The number of touch leads can be the same as the number of electrode blocks TB. One end of each touch lead TL is connected to a touch electrode TP, and the other end can extend to the fan-out area FA. The electrode block TB can be rectangular or other polygonal in shape. Capacitance is generated between the electrode block TB and a finger. When a finger touches the electrode block TB, the capacitance of the touch area changes, generating a touch sensing signal.

[0111] Taking the mutual capacitance structure as an example, as shown in Figures 2, 3, and 6, the touch layer TEL may include multiple first touch electrodes TX and second touch electrodes RX. Each first touch electrode TX may extend along the row direction X and be spaced apart along the column direction Y. Each second touch electrode RX may extend along the column direction Y and be spaced apart along the row direction X, such that each second touch electrode RX intersects with the first touch electrode TX and is insulated from the first touch electrode TX at the intersection. Furthermore, each electrode block TB includes multiple first electrode blocks TBt and multiple second electrode blocks TBr. The first touch electrodes TX include multiple first electrode blocks TBt, and the second touch electrodes RX include multiple second electrode blocks TBr.

[0112] As shown in Figure 2, the touch leads TL may include first touch leads TL1 and second touch leads TL2. One end of each first touch lead TL1 is connected to a first touch electrode TX, and the other end may extend to the fan-out area FA. One end of each second touch lead TL2 is connected to a second touch electrode RX, and the other end may extend to the fan-out area FA. A first touch electrode TX may be connected to one or two first touch leads TL1. If two first touch leads TL1 are connected, the two first touch leads TL1 may be located on both sides of the display area AA.

[0113] One of the first touch electrode TX and the second touch electrode RX can be used as a driving electrode, and the other can be used as a sensing electrode. The driving electrode can receive a driving signal to form a capacitor between the adjacent first electrode block TBt and the second electrode block TBr. When a finger touches the touch area, the capacitance of the touch area can change, and the sensing electrode can send a touch sensing signal.

[0114] In some embodiments of the present disclosure, as shown in Figures 2 and 3 , a first touch electrode TX may include a plurality of first electrode blocks TBt sequentially connected along a row direction X and an electrode connecting portion TBc connecting two adjacent first electrode blocks TBt. A second touch electrode RX may include a plurality of second electrode blocks TBr sequentially connected along a column direction Y and a transfer bridge TBb connecting two adjacent second electrode blocks TBr. The electrode connecting portion TBc and the transfer bridge TBb are located on different layers and intersect with each other, so that the second touch electrode RX intersects with and is insulated from the first touch electrode TX.

[0115] As shown in Figures 2 and 3, in some embodiments of the present disclosure, a first touch electrode TX may include multiple (at least two) electrode rows Th distributed along the column direction Y. Each electrode row Th includes multiple first electrode blocks TBt distributed along the row direction X and an electrode connecting portion TBc connecting two adjacent first electrode blocks TBt. The electrode connecting portion TBc may be a continuous, integral structure or may include multiple connectors distributed at intervals along the column direction Y. A connector in the same electrode connecting portion TBc may simultaneously connect to two adjacent first electrode blocks TBt.

[0116] The electrode rows Th of the same first touch electrode TX can be connected, and the first electrode blocks TBt of the same first touch electrode TX can be connected into a conductive whole, so that they can be connected to the first touch electrode TX through a first touch lead TL1; for example, the first electrode blocks TBt located at the end (the same end) of each electrode row Th can be connected in the column direction Y.

[0117] A second touch electrode RX may include multiple (at least two) electrode columns Rh distributed and connected along the row direction X. Each electrode column Rh may include multiple second electrode blocks TBr spaced apart along the column direction Y and a transfer bridge TBb connecting two adjacent second electrode blocks TBr. The transfer bridge TBb may be a continuous, integral structure or may include multiple bridges spaced apart along the row direction X. The bridges of the same transfer bridge TBb may simultaneously connect to two adjacent second electrode blocks TBr.

[0118] The electrode columns Rh of the same second touch electrode RX can be connected, and the second electrode blocks TBr of the same second touch electrode RX can be connected into a conductive whole, so that they can be connected to the second touch electrode RX through a second touch lead TL2. For example, the second electrode blocks TBr of each electrode column Rh located at the end (the same end) away from the fan-out area FA can be connected in the row direction X.

[0119] As shown in Figures 3 and 4 , the first touch electrodes TX and the second touch electrodes RX are arranged to intersect with each other via electrode connecting portions TBc and transfer bridges TBb, and the electrode connecting portions TBc and transfer bridges TBb are located on different, insulated layers. For example, the touch layer further includes a transfer layer TMA and an isolation layer TLD, wherein:

[0120] The transfer layer TMA is disposed on the light-emitting side of the display substrate PNL, and the transfer bridge TBb is located on the transfer layer TMA.

[0121] The isolation layer TLD overlies the transfer layer TMA. Its material can be inorganic insulating materials such as silicon nitride, silicon oxide, or silicon oxynitride, or organic insulating materials such as optical adhesives. There are no specific limitations here, as long as it is insulating. The electrode layer TMB is disposed on the surface of the isolation layer TLD distal from the display substrate PNL, thereby being insulated from the transfer layer TMA. The electrode connecting portion TBc is located on the electrode layer TMB. In other words, the electrode layer TMB includes not only the electrode blocks TB but also the electrode connecting portion TBc. The electrode connecting portion TBc and the first electrode block TBt to which it is connected can be an integral structure.

[0122] Furthermore, in some embodiments, the touch lead TL may have a single-layer structure, located on the transition layer TMA or the electrode layer TMB. Alternatively, as shown in Figures 23 and 24 , the touch lead TL may have a multilayer structure comprising multiple conductive layers. Taking a multilayer structure as an example, the touch lead TL may include a first line body TLs1 located on the transition layer TMA and a second line body TLs2 located on the electrode layer TMB. The first line body TLs1 and the second line body TLs2 extend along the same path and are connected via a contact hole TLH passing through the isolation layer TLD. The multilayer structure helps reduce the resistance of the touch lead TL. Each touch lead TL may have the aforementioned multilayer structure, or may have a multilayer structure in part and a single-layer structure in part.

[0123] Furthermore, in some embodiments of the present disclosure, the transition layer TMA and the electrode layer TMB may be interchanged, with the transition layer TMA located on the side of the electrode layer TMB away from the display substrate PNL, and the isolation layer TLD covering the electrode layer TMB. However, positioning the transition layer TMA on the side of the electrode layer TMB closer to the display substrate PNL further separates the electrode block TB from the second electrode CAT, thereby reducing signal interference.

[0124] Both the transition layer (TMA) and the electrode layer (TMB) can be single-layer or multi-layer conductive structures. For example, the electrode layer (TMB) can include two outer layers and an intermediate layer located between the two outer layers. The outer layers can be made of titanium, and the intermediate layer can be made of aluminum, meaning the electrode layer (TMB) has a Ti / Al / Ti structure. Alternatively, the outer layers can be made of indium tin oxide (ITO), and the intermediate layer can be made of aluminum, meaning the electrode layer (TMB) has an ITO / Ag / ITO structure. Furthermore, if the transition layer (TMA) has a multi-layer structure, it can also have a Ti / Al / Ti structure or an ITO / Ag / ITO structure.

[0125] Furthermore, as shown in FIG8 to FIG11 , in some embodiments of the present disclosure, the touch layer TEL may further include a touch buffer layer TBU and a touch flat layer TOC, wherein:

[0126] The buffer layer TBU can be provided on the light-emitting side of the display substrate PNL. The material thereof can include inorganic insulating materials such as silicon nitride, silicon oxide, and silicon oxynitride, and is used to prevent impurities on the side of the touch layer TEL close to the display substrate PNL from affecting the formation of the touch layer TEL.

[0127] The touch planarization layer (TOC) can cover either the electrode layer (TMB) or the transition layer (TMA), depending on the relative positions of the transition layer (TMA) and the electrode layer (TMB). If the transition layer (TMA) is located on the side of the electrode layer (TMB) closer to the display substrate (PNL), the touch planarization layer (TOC) covers the electrode layer (TMB). The touch planarization layer (TOC) is used to achieve planarization for stacking other film layers. The touch planarization layer (TOC) can be made of materials such as light-transmitting optical adhesive, without specific limitations.

[0128] Of course, in other embodiments of the present disclosure, the touch layer TEL may not be provided with either the touch buffer layer TBU or the touch flat layer TOC.

[0129] In some embodiments of the present disclosure, as shown in FIG6 , to improve the uniformity of the film of the electrode layer TMB, the electrode layer TMB further includes a dummy electrode TD. This dummy electrode TD may be disposed within the electrode gap TG and extend along the extension direction of the electrode gap TG, thereby dividing the electrode gap TG into a first gap TG1 and a second gap TG2 located on either side of the dummy electrode TD. The first gap TG1 and the second gap TG2 may be considered to be regions of the electrode gap TG located outside the dummy electrode TD. The dummy electrode TD may be partially disconnected and does not necessarily extend continuously along the electrode gap TG. Of course, in other embodiments of the present disclosure, the dummy electrode TD may not be disposed within the electrode gap TG.

[0130] In some embodiments of the present disclosure, as shown in FIG6 , the electrode layer TMB may have a mesh structure formed by intersecting grid lines NHL, having a plurality of mesh holes NH. One mesh hole NH may overlap at least one light-emitting device LD. For example, the mesh holes NH may overlap with the pixel opening PH in a one-to-one correspondence, and the mesh holes NH may be no smaller than the overlapping pixel opening PH. This allows light emitted by the light-emitting device LD to pass through the mesh holes NH. Simultaneously, the transition layer TMA may also have a mesh structure formed by intersecting grid lines NHL, having a plurality of mesh holes NH. The mesh holes NH of the transition layer TMA overlap with the mesh holes NH of the electrode layer TMB in a one-to-one correspondence and have the same size and shape. That is, both the first touch electrode TX (first electrode block TBt and electrode connection portion TBc) and the second touch electrode RX (second electrode block TBr and transition bridge TBb) have a mesh structure having mesh holes NH. In embodiments having dummy electrodes TD, the dummy electrodes TD may also employ the aforementioned mesh structure having mesh holes NH.

[0131] Any of the aforementioned meshes NH can be surrounded by multiple grid lines NHL, which can be polygons such as rectangles, rhombuses, and pentagons, with each side of the polygon representing a grid line NHL. The electrode gap TG can be formed by electrode breaks TC formed on some of the grid lines NHL in the electrode layer TMB, which interrupt the grid lines NHL. Since the meshes NH are surrounded by the grid lines NHL, the electrode breaks TC and the meshes NH surrounded by the grid lines NHL on which they are located are connected. Therefore, the electrode gap TG is formed by the electrode breaks TC and the meshes NH connected by the electrode breaks TC, which are distributed along a specific trajectory. This trajectory can extend in a broken line. The specific path depends on the shape of the electrode block TB, as long as the electrode block TB can be segmented.

[0132] Furthermore, as shown in Figure 6, for an electrode gap TG provided with a dummy electrode TD, the first gap TG1 and the second gap TG2 can be formed by forming sub-fractures TCs on a portion of the grid lines NHL in the electrode layer TMB, interrupting the grid lines NHL. The sub-fractures and the mesh holes NH formed by the grid lines NHL on which they are located are connected, and a single electrode gap TC can be divided into two sub-fractures TCs by the dummy electrode TD. The first gap TG1 and the second gap TG2 are formed by the sub-fractures TCs distributed along a certain trajectory and the mesh holes NH connected by the sub-fractures TCs.

[0133] It should be noted that, as shown in Figures 3 and 4, two adjacent first electrode blocks TBT in the same electrode row Th are connected by the electrode connecting portion TBc, and the two first electrode blocks TBT and the electrode connecting portion TBc can be an integrated structure. Therefore, the electrode gap TG does not cut off the electrode connecting portion TBc, so that the two first electrode blocks TBT are not separated by the electrode gap TG, but the first electrode block TBT is surrounded by the electrode gap TG except for the area connected to the electrode connecting portion TBc, so that the outline of the first electrode block TBT is mainly formed by the division of the electrode gap TG. Therefore, the electrode gap TG mentioned above divides the electrode block TB, and it does not require that any two electrode blocks TB are completely cut off by the electrode gap TG, as long as at least two independent electrode blocks TB are divided. Although the first electrode block TBT and the electrode connecting portion TBc of the same electrode row Th are an integrated structure, it is independent of any second electrode block TBr, that is, it is separated.

[0134] In some embodiments of the present disclosure, as shown in Figures 5 and 6, if there are at least two light-emitting devices LD of different sizes (different areas of their orthographic projections on the driving backplane BP), there are at least two meshes NH of different sizes in each mesh NH, and in the meshes NH overlapping with the two light-emitting devices LD of different sizes, the mesh NH overlapping with the larger light-emitting device LD is larger than the mesh NH overlapping with the smaller light-emitting device LD; that is, the larger the light-emitting device LD, the larger the mesh NH overlapping with it.

[0135] In some embodiments of the present disclosure, in order to increase the area facing each other between an adjacent first electrode block TBT and a second electrode block TBr, thereby increasing the capacitance, the edges of the first electrode block TBT and the second electrode block TBr may be provided with interdigitated fingers spaced circumferentially. In an adjacent first electrode block TBT and a second electrode block TBr, a portion of the interdigitated fingers of the first electrode block TBT may be located between a portion of the interdigitated fingers of the second electrode block TBr, but not in contact with each other, so that the interdigitated fingers of the first electrode block TBT and the interdigitated fingers of the second electrode block TBr are alternately arranged. The interdigitated fingers can make the extension trajectory of the gap between the first electrode block TBT and the second electrode block TBr more tortuous, which is beneficial for increasing the capacitance between the two and improving the sensitivity of the touch sensing operation. Furthermore, for the embodiment in which the above-mentioned dummy electrode TD exists, the dummy electrode TD may extend along the electrode gap TG extending along the zigzag trajectory defined by the interdigitated fingers.

[0136] In some embodiments of the present disclosure, the touch layer TEL can be directly disposed on the surface of the encapsulation layer TFE away from the driver backplane BP, and the anti-reflection layer RL can be disposed on the side of the touch layer TEL away from the driver backplane BP. In this case, if the anti-reflection layer RL adopts the filter portion CF and the anti-reflection light-absorbing layer BM1 described above, the anti-reflection light-absorbing layer BM1 can be used to shield the electrode layer TMB from reflecting ambient light, eliminating the need for a light-absorbing film layer in the touch layer TEL. The inventors have discovered that this method, on the one hand, helps simplify the structure of the touch layer TEL and reduces process difficulty and cost. On the other hand, the touch layer TEL is close to the light-emitting device LD, and the second electrode CAT of the light-emitting device LD increases the load on the touch layer TEL. Signals from the second electrode CAT and other film layers reduce the signal-to-noise ratio (SNR) of the touch layer TEL signal, causing interference with the touch function.

[0137] As shown in Figures 8-11, in some embodiments of the present disclosure, the touch layer TEL can be disposed on the side of the anti-reflection layer RL away from the display substrate PNL. For example, the anti-reflection layer RL can be directly stacked on the surface of the encapsulation layer TFE away from the driving backplane BP, and the touch layer TEL can be directly stacked on the surface of the anti-reflection layer RL away from the driving backplane BP. In this way, the distance between the electrode layer TMB and the second electrode CAT can be increased, reducing interference from the second electrode CAT on the electrode layer TMB, improving the signal-to-noise ratio, and facilitating improved touch accuracy and reducing the risk of touch anomalies. However, the anti-reflection light-absorbing layer BM1 cannot block the electrode layer TMB. Therefore, in some embodiments, a first light-absorbing layer BM2 can be disposed in the touch layer TEL, and the first light-absorbing layer BM2 is located on the side of the electrode layer TMB away from the display substrate PNL. The first light-absorbing layer BM2 can be made of a black insulating material, for example, a resin mixed with carbon black, and the material thereof is not particularly limited herein. The first light absorption layer BM2 can shield the second electrode CAT, absorb ambient light, and prevent the ambient light reflected by the electrode layer TMB from affecting the display effect.

[0138] Furthermore, as shown in Figures 8 and 10 , to avoid blocking the light-emitting devices LD, the first light-absorbing layer BM2 may further include first light-transmitting holes BH2 that overlap with the light-emitting devices LD. The first light-transmitting holes BH2 may overlap with the pixel openings PH in a one-to-one correspondence. The orthographic projection of a pixel opening PH on the driving backplane BP may be located within the orthographic projection of the overlapping first light-transmitting holes BH2 on the driving backplane BP, thereby preventing the first light-absorbing layer BM2 from blocking the light-emitting devices LD. The first light-transmitting holes BH2 can also give the first light-absorbing layer BM2 a mesh structure, covering the grid lines of the mesh-structured electrode layer TMB.

[0139] The inventors have discovered that touch operations based on the touch layer TEL having the first light absorbing layer BM2 described above can sometimes cause touch anomalies. Analysis revealed that the material of the first light absorbing layer BM2 is difficult to ensure complete insulation and exhibits weak conductivity. For example, a resin mixed with carbon black, while considered an insulating material, still exhibits weak conductivity. If the first light absorbing layer BM2 directly covers the surface of the electrode layer TMB, i.e., the two are in direct contact, this weak conductivity may cause adjacent electrode blocks TB to short-circuit, resulting in touch anomalies. To prevent short circuits caused by the first light absorbing layer BM2, in some embodiments, an insulating layer may be provided over the electrode layer TMB. This insulating layer may be an inorganic insulating material such as silicon nitride or silicon oxynitride, or an organic insulating material such as optical adhesive. The first light absorbing layer BM2 is positioned on the surface of the insulating layer away from the display substrate PNL, thereby preventing short circuits caused by the first light absorbing layer BM2. However, this increases the thickness of the touch layer TEL and the overall touch display panel, and requires an additional masking process to form the insulating layer, increasing costs.

[0140] In order to reduce the risk of short circuit without providing an insulating layer, as shown in Figures 8 to 11, the inventors proposed that the first light absorption layer BM2 can be in direct contact with the electrode layer TMB, and the first light absorption layer BM2 at least covers the surface of the electrode layer TMB away from the display substrate PNL; and a light absorption gap BG is opened in the area of ​​the first light absorption layer BM2 corresponding to the electrode gap TG, and the light absorption gap BG extends along the extension direction of the electrode gap TG and overlaps with the electrode gap TG, so that the first light absorption layer BM2 is disconnected at least at the light absorption gap BG, cutting off the path that causes the short circuit of the electrode block TB, and preventing short circuit without adding an additional insulating film layer, thereby reducing the risk of touch abnormality; and because the light absorption gap BG corresponds to the electrode gap TG, and the width of the electrode gap TG is much smaller than the size of the electrode block in any direction, even if the light absorption gap BG is light-transmitting, the film layer underneath will not reflect a large amount of ambient light, and will not cause obvious interference with the display effect.

[0141] The width of the electrode gap TG is the distance between its two sides, that is, the distance between two electrode blocks separated by the electrode gap TG. For a mesh-structured electrode layer TMB, the width of the electrode gap TG can be the distance between the closest regions of the two electrode blocks, such as the width of the electrode cutout TC.

[0142] As shown in Figures 5 and 7, for the electrode layer TMB and the transition layer TMA with a mesh structure, the electrode gap TG includes an electrode break TC that cuts off the grid line NHL. The first light absorption layer BM2 forms a light absorption break BC in the area corresponding to the electrode break TC, and the light absorption break BC can be distributed along the distribution direction of the electrode gap TG; at the same time, the mesh holes NH of the electrode layer TMB are surrounded by the grid lines NHL. Correspondingly, in combination with Figures 19 to 22, the first light absorption layer BM2 is a mesh structure surrounded by absorption lines. The mesh holes of the mesh structure are the first light-transmitting holes BH2, and the first light-transmitting holes BH2 are surrounded by absorption lines BML. The light absorption break BC cuts off part of the absorption line, so that the light absorption break BC can connect part of the first light-transmitting holes BH2, thereby forming a light absorption gap BG.

[0143] Since the first light absorption layer BM2 covers the electrode layer TMB, the touch planarization layer TOC covers the first light absorption layer BM2 and fills the first light transmission hole BH2 to achieve planarization.

[0144] The two side walls of the light absorption fracture BC (i.e., the end surfaces of the free ends of the absorption line intercepted by the light absorption fracture BC) may extend along straight lines, broken lines, curves, or other trajectories. For example:

[0145] As shown in FIG19 , in the first type of light absorption fracture, both side walls of the light absorption fracture BC extend along straight lines perpendicular to its width direction. Specifically, the light absorption line BML is broken to form the light absorption fracture BC, and both side walls ST of the light absorption fracture BC are parallel.

[0146] As shown in Figure 20, in the second type of light-absorbing fracture, the side wall of the light-absorbing fracture BC may include a top surface ST perpendicular to the width direction and two arc-shaped transition surfaces SC smoothly connected to both sides of the top surface ST. The two transition surfaces SC are smoothly connected to the two side walls SS of the absorption line BML where the light-absorbing fracture BC is located, and the top surfaces of the two side walls of the light-absorbing fracture BC are parallel.

[0147] As shown in Figure 21, in the third type of light-absorbing fracture, the side wall of the light-absorbing fracture BC may also include a top surface ST perpendicular to the width direction and two transition surfaces SC connected to both sides of the top surface ST. The two transition surfaces SC are connected to the two side walls SS of the absorption line BML where the light-absorbing fracture BC is located. The transition surface SC is a plane that has a certain angle (not 0°) with the top surface ST; the top surfaces ST of the two side walls of the light-absorbing fracture BC are parallel.

[0148] As shown in Figure 22, in the fourth type of light-absorbing fracture, the side wall of the light-absorbing fracture BC may also include a first top surface ST1 perpendicular to the width direction and a second top surface ST2 connected to one side of the first top surface ST1 at a certain angle (not 0°) to the first top surface ST1; the two first top surfaces ST1 of the two side walls of the light-absorbing fracture BC are parallel, and the two second top surfaces ST2 are parallel.

[0149] Furthermore, as shown in Figures 9 to 11, due to limitations of process accuracy and errors, the sidewalls of the electrode gap TG are not necessarily completely perpendicular to the display substrate PNL, but are slopes that cause the electrode gap TG to shrink in a direction approaching the display substrate PNL. Correspondingly, the slopes cause the sidewalls of the electrode block TB to expand in a direction approaching the display substrate PNL. In order to further improve the effect of reducing ambient light reflection, the boundary of the orthographic projection of the light absorption gap BG on the display substrate PNL can be located inside the boundary of the orthographic projection of the electrode gap TG on the display substrate PNL, that is, the width of the light absorption gap BG is smaller than the width of its corresponding electrode gap TG, that is, the orthographic projection of the light absorption gap BG on the display substrate PNL is located within the orthographic projection of the electrode gap TG on the display substrate PNL, and is spaced apart from the boundary of the orthographic projection of the electrode gap TG on the display substrate PNL. In other words, the first light absorption layer BM2 can extend into the electrode gap TG, thereby covering not only the surface of the electrode layer TMB away from the display substrate PNL, but also the sidewalls of the electrode layer TMB, thereby covering the other surfaces of the electrode layer TMB except the surface in contact with the reflection reduction layer RL, thereby reducing the reflection of ambient light.

[0150] In addition, such a design can also reserve a process margin in advance for the situation where the width of the absorption gap BG is larger than the electrode gap TG due to process errors, etc., to prevent the situation where the surface of the electrode layer TMB is away from the display substrate PNL and is not covered by the first absorption layer BM2.

[0151] The number of light absorption gaps BG can be one or more (no less than two). If multiple light absorption gaps BG are used, each light absorption gap BG can be distributed along the width direction of the electrode gap TG. The orthographic projection of each light absorption gap BG on the display substrate PNL is located within the orthographic projection of the electrode gap TG on the display substrate PNL. In other words, within the range of the light absorption gaps BG, the first light absorption layer BM2 is interrupted by the multiple light absorption gaps BG, which can further reduce the risk of short circuits. Based on the above description of the width of the electrode gap TG, the width direction is the direction perpendicular to the boundaries of the electrode gap TG. Furthermore, the width direction can be the extension direction of the line connecting the two ends of the electrode break TC and its extension line.

[0152] As shown in Figures 3, 5, and 7, in a first embodiment of the present disclosure, the aforementioned dummy electrode TD is disposed within the electrode gap TG. Two light absorption gaps BG are provided, including a first light absorption gap BG1 overlapping the first gap TG1 and a second light absorption gap BG2 overlapping the second gap TG2. This allows the first light absorption layer BM2 to be interrupted by the first and second light absorption gaps BG1 and BG2, reducing the risk of short circuits. Furthermore, the orthographic projection of the first light absorption gap BG1 onto the display substrate PNL can be positioned within the orthographic projection of the first gap TG1, and the orthographic projection of the second light absorption gap BG2 onto the display substrate PNL can be positioned within the orthographic projection of the second gap TG2, minimizing reflection of ambient light. Furthermore, the width of the first light absorption gap BG1 can be smaller than the first gap TG1 it overlaps with, and the width of the second light absorption gap BG2 can be smaller than the second gap TG2 it overlaps with, allowing the first light absorption layer BM2 to cover the sidewalls of the sub-fracture.

[0153] As shown in Figures 12-14, in the second embodiment of the present disclosure, no dummy electrode TD is provided within the electrode gap TG to prevent light reflection. Two light absorption gaps BG are provided, including a first light absorption gap BG1 overlapping with the first gap TG1 and a second light absorption gap BG2 overlapping with the second gap TG2. Furthermore, the orthographic projection of the first light absorption gap BG1 on the display substrate PNL can be positioned within the orthographic projection of the first gap TG1 on the display substrate PNL, and the orthographic projection of the second light absorption gap BG2 on the display substrate PNL can be positioned within the orthographic projection of the second gap TG2 on the display substrate PNL, thereby minimizing reflection of ambient light. Furthermore, the width of the first light absorption gap BG1 can be smaller than the first gap TG1 it overlaps with, and the width of the second light absorption gap BG2 can be smaller than the second gap TG2 it overlaps with. The sidewalls of the sub-fracture are covered by the first light absorption layer BM2.

[0154] In a third embodiment of the present disclosure, for a light absorption gap BG, at least two regions of the boundary of its orthographic projection on the display substrate PNL can be at different distances from the boundary of the orthographic projection of the electrode gap TG on the display substrate PNL, making the light absorption gap BG more tortuous. Even if the light absorption gap BG has reflections, the visual interference can be reduced by making the light absorption gap BG more tortuous. For example:

[0155] As shown in Figures 15 and 16 , to prevent the dummy electrode TD from being exposed within the light-absorbing gap BG and reflecting ambient light, no dummy electrode TD is provided within the electrode gap TG, and the electrode layer TMB has the mesh structure described above. Among the light-absorbing fractures BC that constitute the light-absorbing gap BG, at least some of these fractures BC may be staggered across the width of the electrode gap TG. That is, the light-absorbing fractures BC may not be located in the center of the electrode gap TG, but may be offset to either side. With the set of points equidistant from the two side walls of the electrode gap TG as the centerline of the electrode gap TG, the light-absorbing fractures BC of the overlapping light-absorbing gaps BG may be located in at least two of the following three positions:

[0156] In one approach, the centerline of the light-absorbing fracture BC and the centerline of the electrode gap TG coincide with their orthographic projections on the display substrate PNL. In the other two approaches, the centerlines of the light-absorbing fracture BC and the electrode gap TG are spaced apart, meaning they do not coincide. This reduces the clutter in areas where reflections may occur, reducing interference with the display.

[0157] As shown in Figures 17 and 18, in the fourth embodiment of the present disclosure, the number of the light absorption gap BG can be one, and the distance between the orthographic projections of the two boundaries of the light absorption gap on the display substrate PNL and the orthographic projections of the two boundaries of the electrode gap TG on the display substrate PNL is different, that is, the light absorption gap BG is not located in the middle of the electrode gap TG, but is offset to one side; that is, the first light absorption layer BM2 can extend into the electrode gap TG, and can further extend to cross the center line of the electrode gap TG. The light absorption gap BG can prevent short circuits and increase the coverage range of the first light absorption layer BM2, thereby minimizing the reflection of ambient light. For example:

[0158] Taking the embodiment in which no dummy electrode TD is provided within the electrode gap TG and the electrode layer TMB has the mesh structure described above as an example, the light absorption fractures BC of the light absorption gap BG are located on the same side of the centerline of the electrode gap TG. The width of the light absorption fractures BC is less than half the width of the electrode fractures TC.

[0159] As shown in Figures 23 and 24 , in some embodiments of the present disclosure, the first light absorption layer BM2 is disconnected in the region corresponding to the area between two adjacent touch leads TL. This prevents the first light absorption layer BM2's low conductivity from causing a short circuit between adjacent touch leads TL. Furthermore, the first light absorption layer BM2 can cover the surface of the touch lead TL away from the display substrate PNL and the sidewalls of the touch lead TL, completely enclosing the exposed surface of the touch lead TL to prevent light reflection from the touch lead TL.

[0160] As shown in Figures 8 and 10, in the first embodiment of the present disclosure, the side wall of the first light-transmitting hole BH2 may be a slope that converges toward the display substrate PNL, so that the refractive index of the touch flat layer TOC can be greater than the refractive index of the first light-absorbing layer BM2, so that part of the light emitted by the light-emitting device LD is totally reflected at the contact interface between the touch flat layer TOC and the side wall of the first light-transmitting hole BH2, thereby realizing light convergence, which is beneficial to improving the brightness of the front of the touch display panel.

[0161] Furthermore, as shown in Figures 9 and 10 , in the first embodiment of the present disclosure, the touch display panel may further include a second light absorbing layer BM3 and a transparent flat layer EOC, which may be disposed on the surface of the touch flat layer TOC away from the display substrate PNL. The second light absorbing layer BM3 may be made of a black resin or other light-absorbing material, and may be made of the same material as the first light absorbing layer BM2. Furthermore, the second light absorbing layer BM3 may have a plurality of second light-transmitting holes BH3, with each second light-transmitting hole BH3 overlapping with each first light-transmitting hole BH2, and the two may have a one-to-one correspondence. The sidewalls of the second light-transmitting holes BH3 may be sloped surfaces that converge toward the display substrate PNL.

[0162] In order to prevent the first light absorption layer BM2 and the second light absorption layer BM3 from blocking the light-emitting device LD, the orthographic projection of the pixel opening PH on the driving backplane BP can be located within the orthographic projection of a first light-transmitting hole BH2 on the driving backplane BP, and the orthographic projection of a first light-transmitting hole BH2 on the driving backplane BP is located within the orthographic projection of a second light-transmitting hole BH3 on the driving backplane BP.

[0163] The transparent flat layer EOC covers the second light absorbing layer BM3 and fills the second light-transmitting hole BH3. The refractive index of the transparent flat layer EOC can be greater than that of the second light absorbing layer BM3. This allows some light emitted by the light-emitting device LD to be totally reflected at the interface between the transparent flat layer EOC and the sidewall of the second light-transmitting hole BH3, thereby converging the light and improving the brightness of the front surface of the touch display panel.

[0164] It should be noted that the above-mentioned refractive index is the same and is based on light of the same wavelength, which may be 550 nm, or other values.

[0165] The present disclosure also provides a touch display device, which may include the touch display panel of any of the aforementioned embodiments. The specific structure and beneficial effects of the touch display panel can be referenced above with respect to the touch display panel embodiments and will not be further described here. The display device of the present disclosure can be a medium-to-large touch display device such as a tablet computer, a laptop computer, or an in-vehicle display. It can also be used in other electronic devices with touch display capabilities, such as mobile phones and smart watches, which are not listed here.

[0166] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A touch display panel, wherein: include: A display substrate comprising a plurality of light emitting devices distributed along row and column directions; The touch layer is arranged on the light-emitting side of the display substrate and includes an electrode layer and a first light-absorbing layer; the electrode layer is divided into a plurality of electrode blocks by an electrode gap; the first light-absorbing layer covers the surface of the electrode layer and is provided with a light-absorbing gap overlapping with the electrode gap and a first light-transmitting hole overlapping with the light-emitting device, and the light-absorbing gap extends along the extension direction of the electrode gap.

2. The touch display panel according to claim 1, wherein: The orthographic projection of the light absorption gap on the display substrate is located within the orthographic projection of the electrode gap on the display substrate and is spaced from a boundary of the orthographic projection of the electrode gap on the display substrate.

3. The touch display panel according to claim 1, wherein: There are multiple light absorption gaps, which are distributed along the width direction of the electrode gap; and the orthographic projection of each light absorption gap on the display substrate is located within the orthographic projection of the electrode gap on the display substrate.

4. The touch display panel according to claim 2, wherein: At least two regions of a boundary of an orthographic projection of the light absorption gap on the display substrate are at different distances from a boundary of an orthographic projection of the electrode gap on the display substrate.

5. The touch display panel according to claim 1, wherein: A center line of an orthographic projection of the light absorption gap on the display substrate and a center line of an orthographic projection of the electrode gap on the display substrate are spaced apart from each other.

6. The touch display panel according to claim 1, wherein: The electrode layer further comprises: a dummy electrode disposed in the electrode gap and extending along an extension direction of the electrode gap; the dummy electrode divides the electrode gap into a first gap and a second gap; The light absorption gap includes a first light absorption gap overlapping the first gap and a second light absorption gap overlapping the second gap.

7. The touch display panel according to claim 1, wherein: The electrode layer is a mesh structure formed by intersecting grid lines, and the first light-transmitting holes overlap with the mesh holes of the mesh structure; The electrode gap is formed by an electrode fracture that cuts off part of the grid lines; the first light absorption layer forms a light absorption fracture in an area corresponding to the electrode fracture, and the light absorption gap is formed by the light absorption fracture.

8. The touch display panel according to claim 7, wherein: Each of the light-emitting devices includes at least two light-emitting devices of different sizes, and the light-emitting devices of different sizes emit different colors; each of the meshes includes at least two meshes of different sizes, and one mesh overlaps with one of the light-emitting devices; Among the meshes overlapping the two light-emitting devices of different sizes, the mesh overlapping the larger light-emitting device is larger than the mesh overlapping the smaller light-emitting device; the light-absorbing gap at least intercepts the two meshes of different sizes.

9. The touch display panel according to claim 1, wherein: The touch display panel has a display area and a peripheral area outside the display area, the peripheral area has a fan-out area distributed along the column direction with the display area; the fan-out area has a binding portion; at least part of the electrode blocks are located in the display area; The electrode layer further includes a touch lead connected to the electrode block, the touch lead extends to the fan-out area and is connected to the binding portion; the first light absorption layer is disconnected in a region corresponding to between two adjacent touch leads.

10. The touch display panel according to claim 9, wherein: The first light absorption layer covers a surface of the touch lead away from the display substrate and a sidewall of the touch lead.

11. The touch display panel according to claim 9, wherein: Each of the electrode blocks includes a plurality of first electrode blocks and a plurality of second electrode blocks; the touch layer includes a plurality of first touch electrodes spaced apart along the column direction and a plurality of second touch electrodes spaced apart along the row direction; the first touch electrodes and the second touch electrodes are insulated at the intersection; the first touch electrode includes a plurality of the first electrode blocks, and the second touch electrode includes a plurality of the second electrode blocks; the electrode gap separates the first electrode block and the second electrode block.

12. The touch display panel according to claim 11, wherein: The first touch electrodes include a plurality of electrode rows distributed and connected along the column direction, and the electrode rows include a plurality of first electrode blocks distributed along the row direction and an electrode connecting portion connecting two adjacent first electrode blocks; The second touch electrodes include a plurality of electrode columns distributed and connected along the row direction, and the electrode columns include a plurality of second electrode blocks distributed at intervals along the column direction and a transfer bridge connecting two adjacent second electrode blocks; The first touch electrode and the second touch electrode are connected to the The switching bridges are intersected, and the electrode connecting portion and the switching bridges are located in different layers that are insulated from each other.

13. The touch display panel according to claim 12, wherein: The touch layer further includes: A transfer layer is provided on the light-emitting side of the display substrate; the transfer bridge is located on the transfer layer; an isolation layer covering the transfer layer; the electrode layer is provided on a surface of the isolation layer away from the display substrate; and the electrode connection portion is located on the electrode layer; At least one of the touch leads includes a first wire body located in the transfer layer and a second wire body located in the electrode layer, and the first wire body and the second wire body are connected via a contact hole passing through the isolation layer.

14. The touch display panel according to any one of claims 1 to 13, wherein: The touch layer further includes: The touch-sensitive flat layer covers the first light-absorbing layer and fills the first light-transmitting hole; the refractive index of the touch-sensitive flat layer is greater than the refractive index of the first light-absorbing layer.

15. The touch display panel according to claim 14, wherein: The touch display panel further includes: A second light absorption layer is provided on a surface of the touch flat layer away from the display substrate and has a plurality of second light-transmitting holes, wherein a second light-transmitting hole overlaps with a first light-transmitting hole; A transparent flat layer covers the second light absorbing layer and fills the second light-transmitting hole; the refractive index of the transparent flat layer is greater than the refractive index of the second light absorbing layer.

16. The touch display panel according to claim 15, wherein: The display substrate comprises: Driver backplane; a pixel definition layer, which is provided on the same side of the driving backplane as the light-emitting devices and has pixel openings defining the range of each light-emitting device; The orthographic projection of the pixel opening on the driving backplane is located within the orthographic projection of the first light-transmitting hole on the driving backplane, and the orthographic projection of the first light-transmitting hole on the driving backplane is located within the orthographic projection of the second light-transmitting hole on the driving backplane.

17. The touch display panel according to any one of claims 1 to 13, wherein: The touch display panel further includes: The anti-reflection layer is provided on the light-emitting side of the display substrate, and the touch layer is provided on the anti-reflection layer. A side away from the display substrate; the reflection reduction layer includes a plurality of filter parts, one filter part overlaps with one light emitting device, and the color of any filter part is the same as the light emitting color of the light emitting device overlapping with it.

18. The touch display panel according to claim 17, wherein: The display substrate comprises: Driver backplane; a pixel definition layer, which is provided on the same side of the driving backplane as the light-emitting devices and has pixel openings defining the range of each light-emitting device; The reflective reduction layer further comprises: A reflection reduction and light absorption layer is provided on the light-emitting side of the display substrate and has a plurality of reflection reduction holes, wherein any of the light filtering portions is at least partially confined within a reflection reduction hole; and a reflection reduction hole overlaps with a pixel opening; An orthographic projection of the pixel opening on the driving backplane is located within an orthographic projection of the anti-reflection hole on the driving backplane.

19. The touch display panel according to claim 18, wherein: The distance between the boundary of the orthographic projection of the pixel opening on the driving backplane and the boundary of the orthographic projection of the anti-reflection hole on the driving backplane is 0.5 μm-1 μm.

20. A touch display device, wherein: The touch display panel comprises the touch display panel according to any one of claims 1 to 19.

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