TOUCH DISPLAY PANEL AND TOUCH DISPLAY APPARATUS

A touch display panel has a display area and a fan-out area located at a side of the display area. The display area includes a first display region and a second display region located around the first display region. The touch display panel includes a display substrate and a touch function layer. The display substrate has a display side, and the touch function layer is located on the display side of the display substrate. The touch function layer includes a plurality of touch electrodes and a plurality of touch leads. The plurality of touch electrodes are located in the first display region, and the plurality of touch leads are electrically connected to the plurality of touch electrodes and extend to the fan-out area through the second display region.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies, and in particular, to a touch display panel and a touch display apparatus.

BACKGROUND

In the related art, a frame width of a touch display panel is generally wide, which affects a visual effect of the touch display panel.

SUMMARY

In an aspect, a touch display panel is provided. The touch display panel has a display area and a fan-out area located at a side of the display area, and the display area includes a first display region and a second display region located around the first display region. The touch display panel includes a display substrate and a touch function layer. The display substrate has a display side, and the touch function layer is located on the display side of the display substrate. The touch function layer includes a plurality of touch electrodes and a plurality of touch leads. The plurality of touch electrodes are located in the first display region, and the plurality of touch leads are electrically connected to the plurality of touch electrodes and extend to the fan-out area through the second display region.

In some embodiments, an absolute value of a length difference between portions, located in the display area, of two touch leads in the plurality of touch leads is in a range of 0 mm to 4 mm, inclusive.

In some embodiments, portions, in the display area, of at least two touch leads in the plurality of touch leads are substantially equal in length.

In some embodiments, the plurality of touch leads each include a first leading-out line and a second leading-out line. A terminal of the first leading-out line is electrically connected to a touch electrode in the plurality of touch electrodes and located in the first display region, and another terminal of the first leading-out line extends to the second display region. A terminal of the second leading-out line is electrically connected to a terminal of the first leading-out line away from the touch electrode, and another terminal of the second leading-out line extends to a boundary between the second display region and the fan-out area; the second leading-out line extends along an extending direction of an edge of the first display region. A sum of lengths of the first leading-out line and the second leading-out line in any one touch lead is a first set length; in the plurality of touch leads, touch leads having a greatest first set length are second touch leads, and remaining touch leads are first touch leads. A first touch lead in the first touch leads further includes a first compensation line, and the first compensation line is located in the second display region and electrically connected to a first leading-out line of the first touch lead and/or a second leading-out line of the first touch lead.

In some embodiments, for the first touch lead, a sum of lengths of the second leading-out line and the first compensation line is a second set length, and an absolute value of a difference between second set lengths of two first touch leads in the first touch leads is in a range of 0 mm to 4 mm, inclusive.

In some embodiments, for the first touch lead, the sum of lengths of the second leading-out line and the first compensation line is the second set length; second set lengths of at least two first touch leads in the first touch leads are substantially equal.

In some embodiments, the first touch leads include a first first touch lead and a second first touch lead, and a first set length of the first first touch lead is greater than a first set length of the second first touch lead. First compensation lines of the first touch leads include a first first compensation line and a second first compensation line, and a length of the first first compensation line is less than a length of the second first compensation line. The first first compensation line is electrically connected to the first first touch lead, and the second first compensation line is electrically connected to the second first touch lead.

In some embodiments, first set lengths of touch leads in the plurality of touch leads increase in a direction away from the display area.

In some embodiments, at least part of an orthographic projection of the first compensation line on the display substrate is located outside orthographic projections of first leading-out lines of the plurality of touch leads on the display substrate and/or orthographic projections of second leading-out lines of the plurality of touch leads on the display substrate.

In some embodiments, for the first touch lead, a terminal of the second leading-out line electrically connected to the first leading-out line is a first connection terminal; for the first touch lead, a terminal of the first compensation line is electrically connected to the first connection terminal, and another terminal of the first compensation line extends along the extending direction of the edge of the first display region and along a direction away from the second leading-out line.

In some embodiments, for first compensation lines of the first touch leads, orthographic projections, on the display substrate, of terminals, which are each away from a respective first connection terminal, of the first compensation lines are substantially flush with each other.

In some embodiments, the touch function layer includes a first conductive layer, a second conductive layer, and an insulating layer. The first conductive layer and the second conductive layer are sequentially arranged, and the insulating layer is located between the first conductive layer and the second conductive layer. The first leading-out line and the second leading-out line are located in the first conductive layer, and the first compensation line is located in the second conductive layer.

In some embodiments, the touch function layer includes a first conductive layer, a second conductive layer and an insulating layer. The first conductive layer and the second conductive layer are sequentially arranged, and the insulating layer is located between the first conductive layer and the second conductive layer. The first leading-out line and the second leading-out line are located in the first conductive layer. The first compensation line includes at least two first compensation sub-lines arranged at intervals and at least one first connection portion. The at least two first compensation sub-lines arranged at intervals are located in the first conductive layer. The at least one first connection portion is located in the second conductive layer. A first connection portion in the at least one first connection portion crosses the first leading-out line and is electrically connected to two adjacent first compensation sub-lines in the at least two first compensation sub-lines through first via holes in the insulating layer.

In some embodiments, the plurality of touch electrodes include a plurality of first touch electrodes and a plurality of second touch electrodes. The plurality of first touch electrodes are arranged at intervals along a first direction and all extend along a second direction intersecting the first direction. The plurality of first touch electrodes are located in the first conductive layer. The plurality of second touch electrodes are arranged at intervals along the second direction and all extend along the first direction. The plurality of second touch electrodes and the plurality of first touch electrodes cross each other and are insulated from each other, so as to constitute a capacitor unit at each crossing position; and a minimum closed pattern region where all capacitor units are located as a whole is the first display region. A second touch electrode in the plurality of second touch electrodes includes a plurality of touch sub-electrodes arranged at intervals and a plurality of bridging portions. The plurality of touch sub-electrodes arranged at intervals are located in the first conductive layer. The plurality of bridging portions are located in the second conductive layer. A bridging portion in the plurality of bridging portions crosses a first touch electrode in the plurality of first touch electrodes and is electrically connected to two adjacent touch sub-electrodes in the plurality of touch sub-electrodes through second via holes in the insulating layer.

In some embodiments, a length of a second leading-out line of a second touch lead in the second touch leads is substantially equal to the second set length; or the second touch lead further includes a second compensation line. The second compensation line is located in the second display region and electrically connected to a first leading-out line of the second touch lead and/or a second leading-out line of the second touch lead. For the second touch lead, a sum of lengths of the second leading-out line and the second compensation line is substantially equal to the second set length.

In some embodiments, the display substrate includes a substrate and a plurality of sub-pixels. The plurality of sub-pixels are located on a side of the substrate and located in the display area. An orthographic projection of at least one touch lead in the plurality of touch leads on the substrate avoids an orthographic projection of a light-emitting region of a sub-pixel in the plurality of sub-pixels on the substrate.

In some embodiments, the display area and the fan-out area are arranged in a third direction, and a direction perpendicular to a thickness direction of the display substrate and intersecting the third direction is a fourth direction. At least part of the plurality of touch leads are distributed on two sides of the first display region in the fourth direction, respectively.

In another aspect, a touch display apparatus is provided. The touch display apparatus includes the touch display panel as described above.

In some embodiments, for each of the plurality of touch leads, a terminal is located in the first display region and electrically connected to a touch electrode in the plurality of touch electrodes, and another terminal of the touch lead away from the touch electrode extends to the fan-out area. Lengths of portions, located in fan-out area, of any two touch leads in the plurality of touch electrodes are substantially equal.

In some embodiments, a first included angle exists between the first leading-out line and an end of the touch electrode proximate to the first leading-out line, and the first included angle is an acute angle.

DETAILED DESCRIPTION

Hereinafter, the terms such as “first” and “second” are used for descriptive purposes only, and are not to be construed as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with “first” or “second” may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the terms “a plurality of”, “the plurality of” and “multiple” each mean two or more unless otherwise specified.

In the description of some embodiments, the term “connected” and its derivatives may be used. For example, the term “connected” may be used in the description of some embodiments to indicate that two or more components are in direct physical contact or electrical contact with each other.

The phrase “at least one of A, B and C” has the same meaning as the phrase “at least one of A, B or C”, and they both include the following combinations of A, B and C:

only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B and C.

As used herein, terms such as “about”, “substantially” or “approximately” include a stated value and an average value within an acceptable range of deviation of a particular value. The acceptable range of deviation is determined by a person of ordinary skill in the art in view of the measurement in question and errors associated with the measurement of a particular quantity (i.e., the limitation of the measurement system).

As used herein, terms such as “parallel”, “perpendicular” or “equal” include a stated condition and a condition similar to the stated condition. A range of the similar condition is within an acceptable range of deviation, and the acceptable range of deviation is determined by a person of ordinary skill in the art in view of the measurement in question and errors associated with the measurement of a particular quantity (i.e., the limitation of the measurement system). For example, the term “parallel” includes absolute parallelism and approximate parallelism, and an acceptable range of deviation of the approximate parallelism may be, for example, a deviation within 5°. The term “perpendicular” includes absolute perpendicularity and approximate perpendicularity, and an acceptable range of deviation of the approximate perpendicularity may also be, for example, a deviation within 5°. The term “equal” includes absolute equality and approximate equality, and an acceptable range of deviation of approximate equality may be, for example, a difference between two equals being less than or equal to 5% of any one of the two equals.

It will be understood that, in a case where a layer or component is referred to as being on another layer or a substrate, it may be that the layer or component is directly on the another layer or substrate; or it may be that intermediate layer(s) exist between the layer or component and the another layer or substrate.

FIG.1Ais a structural diagram of a touch display panel, in accordance with some embodiments.

As shown inFIG.1A, embodiments of the present disclosure provide the touch display panel (touch screen panel, which is abbreviated as TSP)200. It will be understood that the touch display panel200is used for displaying image information. For example, the touch display panel200may display still image information, such as a picture or photograph; or the touch display panel200may display a dynamic image, such as a video or game image.

With the rapid development of the display technology, the touch display panel200has a wide application space in the fields of vehicle-mounted display, mobile phone display, tablet computer display, notebook computer display, television display, etc. It will be understood that the touch display panel200has a touch function.

In some examples, the touch display panel200is any one of an organic light-emitting diode (OLED) display, a quantum dot light-emitting diode (QLED) display, and a liquid crystal display (LCD).

In some examples, as shown inFIG.1A, the touch display panel200has a display area AA and a peripheral area CC, and the peripheral area CC is disposed around the display area AA. It will be understood that, the display area AA is used for displaying the image information, and the peripheral area CC is used for providing therein with leads or a driving device electrically connected into the display area AA.

In some examples, a shape of the touch display panel200may be a square, a circle, or other shape. A shape of the display area AA may be the same as or different from the shape of the touch display panel200.

In some examples, as shown inFIG.1A, the touch display panel200includes a plurality of sub-pixels220. The sub-pixel220is the smallest unit of the touch display panel200for displaying the image. The plurality of sub-pixels220are located in the display area AA of the touch display panel200, and the plurality of sub-pixels220are arranged in an array, so that the display area AA can realize an image display function.

In some examples, as shown inFIG.1A, the plurality of sub-pixels220are arranged in a plurality of columns along a first direction X1 and in a plurality of rows along a second direction Y1, and the first direction X1 intersect the second direction Y1. In some examples, the first direction X1 is a horizontal direction, and the second direction Y1 is a vertical direction. For example, the first direction X1 is perpendicular to the second direction Y1.

It will be understood that each sub-pixel220may display a single color, such as red, green, or blue. The touch display panel200may include red sub-pixels, green sub-pixels and blue sub-pixels. By adjusting the luminance (grayscale) of sub-pixels220of different colors, red light, green light and blue light with different intensities may be obtained. At least two of the red light, the green light and the blue light with different intensities are superposed, and thus light of more colors may be displayed. As a result, full-color display of the touch display panel200is realized.

FIG.1Bis another structural diagram of the touch display panel, in accordance with some embodiments.

It will be understood that, the display side of the display substrate210is used for displaying the image information; the plurality of sub-pixels220are included in the display substrate210, so that the display substrate210can implement the display function. The touch function layer100is capable of detecting a touch position. In this way, by arranging the touch function layer100on the display side of the display substrate210, it is possible to enable the touch display panel200to realize the touch function.

In some examples, the touch function layer100is located in the display area AA of the touch display panel200, so that the touch function can be realized in the display area AA. For example, the touch function layer100is made of a transparent material, so as to prevent the touch function layer100from blocking the image information displayed in the display area AA.

With continued reference toFIG.1B, a structure of the display substrate210is illustrated by taking an example in which the display substrate210is an OLED display substrate.

In some examples, as shown inFIG.1B, each sub-pixel220includes a light-emitting device EL and a pixel driving circuit, and the pixel driving circuit is electrically connected to the light-emitting device EL, so as to drive the light-emitting device EL to emit light. For example, the pixel driving circuit includes a plurality of thin film transistors (TFTs) T and at least one capacitor.

For example, as shown inFIG.1B, the display substrate210includes a substrate211and a plurality of conductive film layers216, and the pixel driving circuit is disposed in the plurality of conductive film layers216.

In some examples, the substrate211is made of a flexible material such that the display substrate210is capable of being bent. As a result, the touch display panel200is capable of achieving a function such as curved display, folded display, or rolling display. In some other examples, the substrate211is made of a rigid material.

For example, the substrate211may be made of any one of polyimide (PI), polycarbonate (PC) or polyvinyl chloride (PVC).

For example, as shown inFIG.1B, the plurality of conductive film layers216are located on a same side of the substrate211, and the plurality of conductive film layers216are sequentially arranged. In some examples, as shown inFIG.1B, the plurality of conductive film layers216include an active film layer212, a first gate metal layer Gate1, a second gate metal layer Gate2, a first source-drain metal layer SD1, and a second source-drain metal layer SD2 that are away from the substrate211in sequence.

For example, the active film layer212and the first gate metal layer Gate1 may be used to form part (one, two or more) of the plurality of thin film transistors T, and the active film layer212and the second gate metal layer Gate2 may be used to form another part (one, two or more) of the plurality of thin film transistors T. The first gate metal layer Gate1 and the second gate metal layer Gate2 may be used to form at least one capacitor.

In some examples, insulating film layers (which are not shown in the figures, such as a gate insulating layer, a passivation layer and an organic layer) are provided in the plurality of conductive film layers216, so that two adjacent conductive film layers216are electrically isolated.

It will be noted that, the number of active film layers212is not further limited in the embodiments of the present disclosure. For example, in some examples of the present disclosure, only one active film layer212may be included in the display substrate210, and a material of the active film layer212may include metal oxide or low temperature polysilicon. In some other examples of the present disclosure, two active film layers212may also be included in the display substrate210; a material of one active film layer212includes metal oxide, and a material of another active film layer212includes low temperature polysilicon.

In some examples, the plurality of conductive film layers216may further include a third gate metal layer (not shown in the figures). For example, the first gate metal layer Gate1, the second gate metal layer Gate2, the third gate metal layer, the first source-drain metal layer SD1, and the second source-drain metal layer SD2 are sequentially arranged in the direction away from the substrate211.

As can be seen from the description above, the pixel driving circuit is electrically connected to the light-emitting device EL, so as to drive the light-emitting device EL to emit light. With continued reference toFIG.1B, the light-emitting device EL is illustrated below.

In some examples, as shown inFIG.1B, the light-emitting device EL is located on a side of the plurality of conductive film layers216away from the substrate211. Since the sub-pixel220includes the pixel driving circuit located in the plurality of conductive film layers210and the light-emitting device EL located on the side of the plurality of conductive film layers216away from the substrate211, the plurality of sub-pixels220are located on the side of the substrate211.

For example, as shown inFIG.18, the light-emitting device EL includes a portion of an anode layer AND, a portion of a light-emitting functional layer EML, and a portion of a cathode layer CTD that are sequentially arranged in the direction away from the substrate211.

In some examples, the light-emitting functional layer EML includes a plurality of effective light-emitting portions arranged at intervals. The effective light-emitting portion is used for emitting light. For example, the effective light-emitting portion includes an electroluminescent material. It will be understood that, electroluminescence refers to a phenomenon in which an organic semiconductor material is driven by an electric field to form excitons through carrier injection and transport, and the combination of electrons and holes, and then radiative recombination leads to light emission.

In some examples, as shown inFIG.1B, the display substrate210further includes a pixel define layer PDL. The pixel define layer PDL includes a plurality of opening regions, and an effective light-emitting portion is located in an opening region, so that the plurality of effective light-emitting portions can be arranged at intervals.

It will be understood that, in the plurality of effective light-emitting portions, a part is used for emitting red light, another part is used for emitting green light, and yet another part is used for emitting blue light. For example, different electroluminescent materials may be selected such that the effective light-emitting portions are capable of emitting light of different colors. It will be understood that the number of the effective light-emitting portions emitting red light, the number of the effective light-emitting portions emitting green light, and the number of the effective light-emitting portions emitting blue light may be the same or different.

For example, the effective light-emitting portions emitting red light, the effective light-emitting portions emitting green light, and the effective light-emitting portions emitting blue light may be mixed and arranged in an array. In this way, red light, green light and blue light with different intensities can be obtained by controlling light-emitting intensities of the different effective light-emitting portions. The red light, green light and blue light with different intensities are mixed, so that the touch display panel200may realize the full-color image display.

In some examples, one pixel driving circuit is electrically connected to one effective light-emitting portion through a portion of the anode layer AND, so that each pixel driving circuit can provide a driving current to a corresponding effective light-emitting portion through a portion of the anode layer AND. That is, the plurality of effective light-emitting portions can independently emit light. As a result, mutual interference between the plurality of effective light-emitting portions is reduced, and the display effect of the touch display panel200is improved. It will be understood that, by adjusting the magnitude of the driving current provided from the pixel driving circuit to the effective light-emitting portion, it is possible to adjust the luminance of the effective light-emitting portion.

In some examples, the anode layer AND is made of a metal material, such as copper or silver. The cathode layer CTD is made of a transparent material (such as transparent indium tin oxide (ITO) or transparent indium zinc oxide (IZO)), so that the light emitted from the effective light-emitting portion can exit through the cathode layer CTD. In this case, the display substrate210is a top-emission display substrate.

In some other examples, the anode layer AND is made of the transparent material, such as ITO or IZO. The cathode layer CTD is made of the metal material, such as copper or silver. As a result, the light emitted from the effective light-emitting portion can exit through the anode layer AND. In this case, the display substrate210is a bottom-emission display substrate.

In still some other examples, the anode layer AND and the cathode layer CTD are both made of the transparent material (such as ITO or IZO), so that the light emitted from the effective light-emitting portion can be exit through the anode layer AND and the cathode layer CTD. In this case, the display substrate210is a double-sided emission display substrate.

Embodiments of the present disclosure are described by taking an example in which the display substrate210is the top-emission display substrate. It will be understood that, the touch function layer100is located on the display side of the display substrate210, which means that the touch function layer100is located on a side of the cathode layer CTD away from the anode layer AND.

In some examples, at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron blocking layer (EBL) is disposed between the anode layer and the effective light-emitting portion in a direction directed from the anode layer AND to the effective light-emitting portion. At least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL) is disposed between the cathode layer CTD and the effective light-emitting portion in a direction directed from the cathode layer CTD to the effective light-emitting portion. The arrangements above improve the light-emitting reliability of the effective light-emitting portion.

In some examples, as shown inFIG.1B, the display substrate210further includes a planarization layer213. The planarization layer213is located between the plurality of conductive film layers216and the light-emitting device EL. That is, the light-emitting device EL is located on a side of the planarization layer213away from the plurality of conductive film layers216. It will be understood that a surface of the planarization layer213away from the plurality of conductive film layers216is a smooth or approximately smooth plane.

In some examples, in addition to pixel driving circuits, the plurality of conductive film layers216further includes a plurality of signal leads (such as data lines and power supply signal lines). Signal leads are electrically connected to the pixel driving circuit and the light-emitting device EL and used for transmitting electric signals, so that the pixel driving circuit can drive the light-emitting device EL to emit light. As a result, different grayscales are displayed.

In some examples, as shown inFIG.1B, the display panel210further includes an encapsulation layer214. The encapsulation layer214is located on a side of the light-emitting device EL away from the substrate211. It will be understood that, the encapsulation layer214can cover the light-emitting device EL, so as to wrap the light-emitting device EL, which prevents water vapor and oxygen in the external environment from entering the light-emitting device EL, and plays a role of protecting the light-emitting device EL.

FIG.1Cis a structural diagram of the touch function layer, in accordance with some embodiments;FIG.1Dis a structural diagram of an electrode plate, in accordance with some embodiments. Referring toFIGS.1C and1D, the touch function layer100is illustrated below.

In some examples, as shown inFIG.1C, the touch function layer100′ includes a plurality of touch electrodes110and a plurality of touch leads120. The plurality of touch leads120are electrically connected to the plurality of touch electrodes110.

For example, the touch electrodes110are metal mesh touch electrodes, and thus the touch display panel200is a metal mesh touch screen panel (TSP).

For example, as shown inFIG.1C, the plurality of touch electrodes110include a plurality of first touch electrodes111and a plurality of second touch electrodes112. The plurality of first touch electrodes111are arranged at intervals along the first direction X1, and all extend along the second direction Y1 that intersects the first direction X1. It will be understood that the plurality of first touch electrodes111arranged along the first direction X1 are insulated from each other.

For example, as shown inFIG.1C, the plurality of second touch electrodes112are arranged at intervals along the second direction Y1, and all extend along the first direction X1. It will be understood that the plurality of second touch electrodes112arranged along the second direction Y1 are insulated from each other. For example, the first direction X1 is perpendicular to the second direction Y1.

In some examples, the first touch electrode111is a touch transmitting electrode (Tx), and the second touch electrode112is a touch receiving electrode (Rx). In some other examples, the first touch electrode111is a touch receiving electrode (Rx) and the second touch electrode112is a touch transmitting electrode (Tx).

In some examples, as shown inFIG.1C, edges of a minimum closed pattern region where the plurality of first touch electrodes111and the plurality of second touch electrodes112are located as a whole coincides with edges of the display area AA.

For example, as shown inFIG.1D, the plurality of second touch electrodes112and the plurality of first touch electrodes111cross each other and are insulated from each other. It will be understood that, the plurality of second touch electrodes112and the plurality of first touch electrodes111crossing each other means that an orthographic projection of the plurality of first touch electrodes111on the display substrate210and an orthographic projection of the plurality of second touch electrodes112on the display substrate210cross each other.

It will be understood that, as shown inFIG.1C, since the plurality of first touch electrodes111and the plurality of second touch electrodes112cross each other and are insulated from each other, a capacitor unit113(i.e., a touch pattern) may be formed at each crossing position between the plurality of first touch electrodes111and the plurality of second touch electrodes112. For example, a plurality of capacitor units113are located in the display area AA and arranged in an array.

In some examples, the capacitor unit113is in a shape of a square or approximately square. For example, side lengths of the square capacitor unit113may be 4 mm.

It will be understood that, when the capacitor unit113is touched by a human finger or a stylus, a capacitance of the human finger or the stylus is superposed to the corresponding capacitor unit113, so that a capacitance of the capacitor unit113is changed. In this way, by obtaining capacitance values of the plurality of capacitor units113, the touch position may be determined, thereby implementing the touch function.

It will be understood that, the plurality of touch electrodes110and the plurality of touch leads120are electrically connected, and the plurality of touch electrodes110can constitute the capacitor units113. Therefore, the plurality of touch leads120can be electrically connected to the capacitor units113.

FIG.1Eis a structural diagram of the capacitor unit, in accordance with some embodiments. Referring toFIGS.1D and1E, the touch electrode is illustrated below.

For example, as shown inFIGS.1D and1E, the first touch electrode111includes a plurality of touch structures1111and a plurality of connecting structures1112. The plurality of touch structures1111are arranged at intervals along the second direction Y1, and the connecting structure1112is located between any two adjacent touch structures1111and electrically connected to the two adjacent touch structures1111, so that the first touch electrode111can extend along the second direction Y1.

For example, as shown inFIG.1E, any one touch structure1111includes a first portion114, and first portions114of any two adjacent touch structures1111are arranged oppositely. In some examples, the touch structure1111may include two first portions114. Shapes of the two first portions114are the same, and areas of the two first portions114are the same.

For example, as shown inFIG.1E, the second touch electrode112includes a plurality of touch sub-electrodes1121and a plurality of bridging portions1122. The plurality of touch sub-electrodes1121are arranged at intervals along the first direction X1, and a bridging portion1122is located between any two adjacent touch sub-electrodes1121and electrically connected to the two adjacent touch sub-electrodes1121, so that the second touch electrode112can extend along the first direction X1.

For example, as shown inFIG.1E, any one touch sub-electrode1121includes a second portion115, and second portions115of any two adjacent touch sub-electrodes1121are arranged oppositely. In some examples, the touch sub-electrode1121may include two second portions115. Shapes of the two second portions115are the same, and areas of the two second portions115are the same.

For example, as shown inFIG.1E, an orthographic projection of the connecting structure1112aon the display substrate210intersects an orthographic projection of the bridging portion1122aon the display substrate210. It will be noted that, the connecting structure1112aand the bridging portion1122aare only used to define a connecting structure1112and a bridging portions1122whose orthographic projections on the display substrate210intersect, and the connecting structure1112and the bridging portion1122are not further limited.

As shown inFIG.1E, the plurality of touch structures1111include a first touch structure1111aand a second touch structure1111bthat are disposed adjacently, and the connecting structure1112ais located between the first touch structure1111aand the second touch structure1111band electrically connected to the first touch structure1111aand the second touch structure1111b.

It will be noted that, the first touch structure1111aand the second touch structure1111bare only used for distinguishing two touch structures1111that are electrically connected to the connecting structure1112aand disposed adjacently, and the touch structures1111are not further limited.

As shown inFIG.1E, the plurality of touch sub-electrodes1121include a first touch sub-electrode1121aand a second touch sub-electrode1121b, and the bridging portion1122ais located between the first touch sub-electrode1121aand the second touch sub-electrode1121band electrically connected to the first touch sub-electrode1121aand the second touch sub-electrode1121b.

It will be noted that, the first touch sub-electrode1121aand the second touch sub-electrode1121bare only used for distinguishing two touch sub-electrodes1121that are electrically connected to the bridging portion1122aand are disposed adjacently, and the touch sub-electrodes1121are not further limited.

For example, as shown inFIG.1E, the first portion114aof the first touch structure1111aand the first portion114bof the second touch structure1111bare arranged oppositely, and the second portion115aof the first touch sub-electrode1121aand the second portion115bof the second touch sub-electrode1121bare disposed oppositely. The first portion114aof the first touch structure1111a, the first portion114bof the second touch structure1111b, the second portion115aof the first touch sub-electrode1121a, the second portion115bof the second touch sub-electrode1121b, the connecting structure1112aand the bridging portion1122acan together constitute the capacitor unit113.

It will be noted that, the first portion114aand the first portion114bare only used for distinguishing a first portion114of the first touch structure1111afrom a first portion114of the second touch structure1111b, and the first portions114are not further limited; the second portion115aand the second portion115bare only used for distinguishing a second portion115of the first touch sub-electrode1121afrom a second portion115of the second touch sub-electrode1121b, and the second portions115are not further limited.

As can be seen from the description above, the plurality of touch electrodes110and the plurality of touch leads120are electrically connected. In some examples, as shown inFIG.1C, the plurality of touch leads120include first-type touch leads120aand second-type touch leads120b.

For example, a plurality of first-type touch leads120aare provided, and at least one first-type touch lead120ais electrically connected to one first touch electrode111. In some examples, as shown inFIG.1C, two first-type touch leads120aare electrically connected to two ends of the same first touch electrode111in the second direction Y1, respectively. In some other examples, one first-type touch lead120ais electrically connected to an end of one first touch electrode111in the second direction Y1.

For example, a plurality of second-type touch leads120bare provided, and at least one second-type touch lead120bis electrically connected to one second touch electrode112. In some examples, as shown inFIG.1C, two second-type touch leads120bare electrically connected to two ends of the same second touch electrode112in the first direction X1, respectively. In some other examples, one second-type touch lead120bis electrically connected to an end of one second touch electrode112in the first direction X1.

It will be noted that, the first-type touch lead120aand the second-type touch lead120bare only used for distinguishing a touch lead120electrically connected to the first touch electrode111and a touch lead120electrically connected to the second touch electrode112, and the touch leads120are not further limited.

In some examples, as shown inFIG.1C, the plurality of touch electrodes110are located in the display area AA, and the plurality of touch leads120are located in the peripheral area CC.

For example, the plurality of touch electrodes110may be made of transparent indium tin oxide (ITO), transparent indium zinc oxide (IZO) or the like, which reduces the influence of the touch electrodes110on the image information displayed in the display area AA.

It will be understood that, as a size resolution (pixels per inch, which is abbreviated as PPI) of the touch display panel200is higher and higher, the number of leads (e.g., the touch leads120, the power supply signal lines, or other leads) required to be arranged in the peripheral area CC of the touch display panel200is more and more, resulting in an increase of a width of the peripheral area CC. Therefore, a width of frames (such as frames on both sides in the first direction X1 and frames on both sides in the second direction Y1) of the touch display panel200is increased, which is not conducive to the narrow frame of the touch display panel200, and affects the visual effect of the touch display panel200.

FIG.2Ais yet another structural diagram of the touch display panel, in accordance with some embodiments.

In light of this, the touch display panel200is provided in embodiments of the present disclosure. Referring toFIG.2A, the touch display panel200provided in embodiments of the present disclosure is illustrated below.

In some embodiments, referring toFIG.2A, the touch display panel200has the display area AA and a fan-out area BB located at a side of the display area. It will be understood that, the display area AA is used for displaying the image information, and the fan-out area BB is used for providing therein with leads electrically connected into the display area AA.

In some examples, the fan-out area BB is located below the display area AA in using states of the touch display panel200. That is, the fan-out area BB may be closer to the ground than the display area AA in some using states.

As can be seen from the description above, the peripheral area CC of the touch display panel200is disposed around the display area AA. For example, as shown inFIG.2A, the fan-out area BB is located in the peripheral area CC of the touch display panel200.

As shown inFIG.2A, the display area AA includes a first display region AA1 and a second display region AA2 located around the first display region AA1. It will be understood that, both the first display region AA1 and the second display region AA2 can display the image information.

The second display region AA2 is located around the first display region AA1. For example, as shown inFIG.2A, edges of the second display region AA2 proximate to the first display region AA1 coincide with edges of the first display region AA1 proximate to the second display region AA2, so that the second display region AA2 can be disposed around the first display region AA1 and adjacent to the first display region AA1.

The fan-out area BB is located at the side of the display area AA. In some examples, the fan-out area BB is disposed adjacent to the second display region AA2. For example, an edge of the fan-out area BB proximate to the second display region AA2 coincides with an edge of the second display region AA2 proximate to the fan-out area BB.

It will be noted that, consideringFIG.2Ain the drawings of the present disclosure as an example, the edge of the fan-out area BB and the edge of the second display region AA2 are separated from each other, which is only for convenience of illustrating the fan-out area BB and the second display region AA2, and the fan-out area BB and the second display region AA2 are not further limited.

It will be understood that, the embodiments of the present disclosure have illustrated the display substrate210, the touch electrodes110, and an electrical connection relationship between the plurality of touch leads120and the plurality of touch electrodes110, which will not be repeated here.

As shown inFIG.2A, the plurality of touch electrodes110are located in the first display region AA1, and the plurality of touch leads120extend to the fan-out area BB through the second display region AA2.

It will be understood that, the plurality of touch electrodes110are located in the first display region AA1, so that the touch function can be implemented in the first display region AA1. The plurality of touch leads120are electrically connected to the plurality of touch electrodes110. For example, as shown inFIG.2A, for each of the plurality of touch leads120, a terminal is located in the first display region AA1 and electrically connected to a touch electrode110, and another terminal extends to the fan-out area BB through the second display region AA2.

It will be understood that, by arranging the plurality of touch leads120to extend to the fan-out area BB through the second display region AA2, it may be possible to avoid the touch leads120from occupying a space in the peripheral area CC, and reduce the width of the peripheral area CC of the touch display panel200. As a result, the width of side frames (e.g., the frames on both sides in the first direction X1 and the frames on both sides in the second direction Y1) of the touch display panel200can be reduced, which helps realize the narrow frame of the touch display panel200, maximizes the display area AA of the touch display panel200, and minimizes the peripheral area CC, thereby improving the visual effect of the touch display panel200.

In the examples, the plurality of touch leads120are arranged to extend to the fan-out area BB through the second display region AA2, so that both sides of the touch display panel200in the first direction X1 and a side of the touch display panel200away from the fan-out area BB can be frameless. As a result, the visual effect of the touch display panel200is improved.

In addition, in the embodiment of the present disclosure, the plurality of touch electrodes110are located in the first display region AA1, and the plurality of touch leads120extend to the fan-out area BB through the second display region AA2, so that the mutual influence between the touch leads120and the touch electrodes110is reduced. As a result, the reliability of the touch display panel200is improved.

As can be seen from the description above, the plurality of first touch electrodes111and the plurality of second touch electrodes112cross each other and are insulated from each other, so that a capacitor unit113can be constituted at each crossing position. For example, as shown inFIG.2A, the plurality of capacitor units113can be arranged in the array along the first direction X1 and the second direction Y1. Capacitor units113arranged along the first direction X1 are electrically connected, and capacitor units113arranged along the second direction Y1 are electrically connected.

FIG.2Bis another structural diagram of the touch function layer, in accordance with some embodiments.

As can be seen from the description above, as shown inFIG.2B, the plurality of touch electrodes110include a plurality of first touch electrodes111and a plurality of second touch electrodes112. Part (two or more) of the plurality of touch leads120are electrically connected to the first touch electrodes111, and other part (two or more) of the plurality of touch leads120are electrically connected to the second touch electrodes112.

For example, as shown inFIG.2B, the first-type touch lead120aelectrically connected to the first touch electrode111extends to the fan-out area BB through portions of the second display region AA2 located at two sides of the first display region AA1 in the second direction Y1 and a portion of the second display region AA2 located at one side of the first display region AA1 in the first direction X1. Alternatively, the first-type touch lead120aelectrically connected to the first touch electrode111extends to the fan-out area BB through a portion of the second display region AA2 that is located at a side of the first display region AA1 in the second direction Y1 and close to the fan-out area BB.

For example, as shown inFIG.2B, the second-type touch lead120belectrically connected to the second touch electrode112extends to the fan-out area BB through a portion of the second display region AA2 located at a side of the first display region AA1 in the first direction X1 and the portion of the second display region AA2 that is located at the side of the first display region AA1 in the second direction Y1 and close to the fan-out area BB.

In some examples, the touch lead120may be made of transparent indium tin oxide (ITO) or transparent indium zinc oxide (IZO), thereby reducing the influence of the touch lead120on image information displayed in the second display region AA2.

In some examples, as shown inFIG.2A, the touch display panel200further includes a connecting area230, and the connecting area230is located in the peripheral area CC. For example, the connecting area230is located on a side of the fan-out area BB away from the display region AA. A plurality of connecting pins (not shown in the figure) are provided in the connecting area230. The touch lead120extends to the connecting area230and is electrically connected to the connecting pin in the connecting area230.

For example, a flexible printed circuit (FPC) board (not shown in the figure) outside the touch display panel200can be bonded to connecting pins in the connecting area230. The flexible printed circuit board is mounted with a touch integrated circuit (which is abbreviated as IC and not shown in the figure). The touch IC can obtain capacitance values of the plurality of touch electrodes110(i.e., the capacitance values of the plurality of capacitor units113) through the flexible printed circuit board and the touch leads120, so that the touch IC can determine the touch position according to the capacitance values of the plurality of capacitor units113. For example, the touch IC is mounted on the flexible printed circuit board by using a chip on film (COF) process.

In some examples, as shown inFIG.2A, the touch display panel200further includes a plurality of data lines160. For example, for each of the plurality of data lines160, a terminal is electrically connected to multiple sub-pixels220, and another terminal is electrically connected to a connecting pin in the connecting area230. A driver IC (not shown inFIG.2A) outside the touch display panel200is electrically connected to the plurality of data lines160through connecting pins in the connecting area230. Thus, the driver IC can output data signals to the sub-pixels220through the plurality of data lines160, thereby driving the sub-pixels220to emit light.

In some examples, the driver IC is mounted, by using a COF process, on the flexible printed circuit board that is bonded in the connecting area230.

In some examples, a terminal of the flexible printed circuit board away from the connecting area230is electrically connected to a main control circuit board.

In some examples, as shown inFIG.2A, the touch display panel200further has a bending area DD, and the bending area DD is located in the peripheral area CC. For example, the bending area DD is located between the fan-out area BB and the connecting area230.

It will be understood that, the bending area DD can be bent towards a direction away from the display side, so that the connecting area230can be located on a back side of the display substrate210(i.e., a side of the display substrate210away from the display side). As a result, it may be possible to avoid the connecting area230, the flexible printed circuit board that is bonded in the connecting area230, and the like from occupying a space of the display side of the display substrate210, and reduce a width of a lower frame (a frame close to the fan-out area BB) of the touch display panel200, thereby improving the visual effect of the touch display panel200.

FIG.2Cis yet another structural diagram of the touch display panel, in accordance with some embodiments.

As can be seen from the description above, in some examples, the driver IC is mounted, by using the COF process, on the flexible printed circuit board that is bonded in the connecting area230. In some other examples, as shown inFIG.2C, the touch display panel200further includes a bonding area240. The bonding area240is located in the peripheral area CC and between the connecting area230and the bending area DD. The driver IC (referring to the mark number242inFIG.2C) is bonded, by using a chip on panel (COP) process, on the substrate211of the display substrate210located in the bonding area240.

For example, the plurality of data lines160are electrically connected in the bonding area240. Thus, the driver IC can output the data signals to the sub-pixels220through the plurality of data lines160, thereby driving the sub-pixels220to emit light.

For example, as shown inFIG.2A, the plurality of data lines160approach and are gathered in the fan-out area BB. That is, a distance between at least two data lines160in the plurality of data lines160gradually decreases in the fan-out area BB.

In some examples, as shown inFIG.2A, in the fan-out area BB, the plurality of touch leads120are located at two sides of the plurality of data lines160. With such an arrangement, a length of the touch lead120is shortened, so that the resistance of the touch lead120is reduced, and the load of the touch lead120is reduced. As a result, the transmission reliability of the signal on the touch lead120is improved.

As can be seen from the description above, in the embodiment of the present disclosure, the touch electrodes110are arranged in the first display region AA1, and the touch leads120are arranged to extend to the fan-out area BB through the second display region AA2, so that the touch leads120are avoided from occupying the space of the peripheral area CC of the touch display panel200. As a result, it is possible to reduce the width of the peripheral area CC, and facilitate the realization of the narrow frame of the touch display panel200, thereby improving the visual effect of the touch display panel200.

In addition, the touch leads120are arranged to extend to the fan-out area BB through the second display region AA2, and the touch electrodes110are located in the first display region AA1, which reduces the mutual influence between the touch leads120and the touch electrodes110, and improves the touch performance of the touch function layer100on the basis of realizing the narrow frame of the touch display panel200, thereby improving the use performance of the touch display panel200.

Moreover, since the touch leads120are relatively thin, and the touch leads120are arranged in the second display region AA2, there is a relatively small influence on the image information displayed in the second display region AA2. As a result, the risk that the touch leads120are observed by naked eyes is reduced, thereby improving the display performance of the touch display panel200.

Furthermore, the touch leads120are arranged to extend to the fan-out area BB through the second display region AA2, so that the process is simple, and the implementation is easy. As a result, the production efficiency of the touch display panel200is improved, and the cost of the touch display panel200is reduced.

FIG.2Dis a diagram showing a positional relationship between a touch effective region and the display area, in accordance with some embodiments;FIG.2Eis yet another structural diagram of the touch display panel, in accordance with some embodiments.

As can be seen from the description above, the plurality of touch electrodes110include the plurality of first touch electrodes111and the plurality of second touch electrodes112. The plurality of first touch electrodes111are arranged at intervals along the first direction X1, and all extend along the second direction Y1 which intersects the first direction X1. The plurality of second touch electrodes112are arranged at intervals along the second direction Y1, and all extend along the first direction X1. The plurality of second touch electrodes112and the plurality of first touch electrodes111cross each other and are insulated from each other, so as to constitute a capacitor unit113at each crossing position.

For example, as shown inFIG.1C, the plurality of touch electrodes110can constitute the plurality of capacitor units113, and the edges of the minimum closed pattern region where the touch electrodes110are located as a whole coincides with the edges of the display area AA.

It will be understood that, as shown inFIG.1C, the capacitor unit113is in the shape of the square or approximately square, and the edges of the minimum closed pattern region where the touch electrodes110are located as the whole coincides with the edges of the display area AA. In this way, in a case where the display area AA is in a shape of a rectangle, a circle or in another irregular shape, part of the touch electrodes110at the edge cannot constitute a complete capacitor unit113.

That is, as shown inFIGS.1C and2D, an interval exists between an edge of a minimum closed pattern region where the plurality of capacitor units113are located as a whole and the edge of the display area AA. It will be noted that,FIG.2Dillustrates a portion of the minimum closed pattern region where the plurality of capacitor units113are located as the whole, and the number of capacitor units113is not limited in the embodiments of the present disclosure.

As shown inFIG.2D, in the case where the human finger or the stylus touches the minimum closed pattern region where the plurality of capacitor units113are located as the whole, the touch position can be obtained by the touch display panel200; and in a case where the human finger or the stylus touches a region inside the display area AA and outside the minimum closed pattern region where the plurality of capacitor units113are located as the whole, the touch position cannot be accurately obtained or even obtained by the touch display panel200.

For example, as shown inFIG.2D, the minimum closed pattern region where the plurality of capacitor units113are located as the whole may be referred to as the touch effective region (as shown by the region AA3 inFIG.2D), and the region inside the display area AA and outside the touch effective region may be referred to as a touch ineffective region (a dummy region, as shown by the region AA4 inFIG.2D).

For example, as shown inFIG.2E, the touch ineffective region is located between the touch effective region and the peripheral area CC. In addition, the touch effective region and the touch ineffective region each are provided with touch electrodes110therein, and the touch leads120are located in the peripheral area CC. In this way, the width of the peripheral area CC is increased, and thus the frame width of the touch display panel200is increased. For example, touch electrodes110located in the touch ineffective region may be referred to as dummy blocks.

As can be seen from the description above, in some examples, as shown inFIG.2B, the display area AA includes the first display region AA1 and the second display region AA2, and the second display region AA2 is disposed around the first display region AA1.

In some embodiments, as shown inFIG.2B, the minimum enclosed pattern region where the plurality of capacitor units113are located as the whole is the first display region AA1.

It will be understood that, in a case where the human finger or the stylus touches the first display region AA1, the touch display panel200can obtain the touch position. That is, the first display region AA1 is the touch effective region. For example, as shown inFIG.2B, an edge of the touch electrodes110coincides with an edge of the first display region AA1.

The second display region AA2 is disposed around the first display region AA1, and the touch leads are arranged in the second display region AA2. It will be understood that, since the edge of the touch electrodes110coincides with the edge of the first display region AA1, and no touch electrode110is provided in the second display region AA2, no touch position can be obtained in the second display region AA2. That is, the second display region AA2 is the touch ineffective region.

That is, in the embodiments of the present disclosure, no touch electrode110is provided in the touch ineffective region, and the plurality of touch leads120are arranged to extend to the fan-out area BB through the touch ineffective region (i.e., the second display region AA2), so that the narrow frame of the touch display panel200can be realized on the basis of not affecting the touch performance of the touch display panel200. As a result, the reliability of the touch display panel200is improved.

In addition, by arranging the edge of the touch electrodes110to coincide with the edge of the first display region AA1 (i.e., by arranging the edge of the touch electrodes110to coincide with the edge of the touch effective region), it may be possible to avoid the touch electrodes110from extending to the touch ineffective region, thereby simplifying the structure of the touch function layer100, and reducing the cost of the touch function layer100.

FIG.2Fis a partial structural diagram of the touch function layer, in accordance with some embodiments.

As can be seen from the description above, the plurality of capacitor units113can be electrically connected to the plurality of touch leads120. For example, as shown inFIG.2F, capacitor units113include a capacitor unit113aand a capacitor unit113b, and the capacitor unit113aand the capacitor unit113bare adjacently disposed along the second direction Y1. It will be noted that, the capacitor unit113aand the capacitor unit113bare only used for distinguishing two capacitor units113that are adjacently disposed along the second direction Y1, and the capacitor units113are not further limited.

As shown inFIG.2F, touch leads120include a touch lead120cand a touch lead120d. The touch lead120cis electrically connected to the capacitor unit113a, and the touch lead120dis electrically connected to the capacitor unit113b. It will be noted that, the touch lead120cand the touch lead120dare only used for distinguishing two touch leads120that are electrically connected to the capacitor unit113aand the capacitor unit113b, respectively, and the touch leads120are not further limited.

For example, as shown inFIG.2F, since the capacitor unit113aand the capacitor unit113bare adjacently disposed along the second direction Y1, a length of a portion of the touch lead120clocated in the display area AA is greater than a length of a portion of the touch lead120dlocated in the display area AA.

That is, the plurality of capacitor units113are arranged in the array, which causes lengths of the plurality of touch leads120located in the display area AA to be different, thereby affecting the load uniformity of the plurality of touch leads120. As a result, the touch performance of the touch function layer100is affected.

In some examples, as shown inFIG.2F, lengths of portions of the plurality of touch leads120located in the display area AA gradually increase in a direction away from the display area AA. In some other examples, the lengths of the portions of the plurality of touch leads120located in the display area AA gradually decrease in the direction away from the display area AA.

FIG.2Gis yet another structural diagram of the touch display panel, in accordance with some embodiments;FIG.2His yet another structural diagram of the touch display panel, in accordance with some embodiments.

Based on this, in some embodiments of the present disclosure, as shown inFIGS.2G and2H, an absolute value of a length difference between portions, located in the display area AA, of two touch leads120in the plurality of touch leads120is in a range of 0 mm to 4 mm, inclusive.

It will be understood that, the length of the portion of the touch lead120located in the display area AA is a sum of a length of a portion of the touch lead120located in the first display region AA1 and a length of a portion of the touch lead120located in the second display region AA2.

In some examples, an absolute value of a length difference between portions of any two touch leads120located in the display area AA (including the first display region AA1 and the second display region AA2) is in the range of 0 mm to 4 mm, inclusive.

With such an arrangement, the length uniformity of the portions of the plurality of touch leads120located in the display area AA is improved, which improves the resistance uniformity of the plurality of touch leads120, and can also improve the uniformity of parasitic capacitances formed between the plurality of touch leads120and another film layer (e.g., the cathode layer CTD in the display substrate210or the touch electrodes110located in the first display region AA1), so that the plurality of touch leads120can be arranged with equal capacitances. In this way, the load uniformity of the plurality of touch leads120can be improved, thereby improving the touch performance of the touch function layer100. As a result, the use performance of the touch display panel200is improved.

In some examples, the absolute value of the length difference between the portions of any two touch leads120located in the display area AA may be 0 mm, 1 mm, 2 mm, 3 mm, etc.

As can be seen from the description above, a terminal of the touch lead120away from the touch electrode110extends to the fan-out area BB. In some examples, lengths of portions of any two touch leads120located in fan-out area BB are substantially equal. With such an arrangement, it may be possible to improve the length uniformity of portions of the plurality of touch leads120located in the fan-out area BB on the basis of improving the length uniformity of the portions of the plurality of touch leads120located in the display area AA. As a result, the length uniformity of the plurality of touch leads120(each including the portion located in the display area AA and the portion located in the fan-out area BB) is improved, and thus the touch performance of the touch function layer100is further improved.

In some embodiments, as shown inFIGS.2G and2H, portions, located in the display area AA, of at least two touch leads120in the plurality of touch leads120are substantially equal in length.

For example, the absolute value of the length difference between the portions of the at least two touch leads120located in the display area AA may range from 0 mm to 3 mm (inclusive), 0 mm to 2 mm (inclusive), or 0 mm to 1 mm (inclusive).

For example, the absolute value of the length difference between the portions of the at least two touch leads120located in the display area AA may be 0.5 mm, 1.2 mm, 1.8 mm, or 2.2 mm, or the like.

In some examples, portions of any two touch leads120located in the display area AA are substantially equal in length.

With such an arrangement, the length uniformity of the portions of the plurality of touch leads120located in the display area AA is improved, which improves the resistance uniformity of the plurality of touch leads120, and can also improve the uniformity of the parasitic capacitances formed between the plurality of touch leads120and another film layer (e.g., the cathode layer CTD in the display substrate210or the touch electrodes110located in the first display region AA1), so that the plurality of touch leads120can be arranged with equal capacitances. In this way, the load uniformity of the plurality of touch leads120can be improved, thereby improving the touch performance of the touch function layer100. As a result, the use performance of the touch display panel200is improved.

FIG.3Ais yet another structural diagram of the touch display panel, in accordance with some embodiments.

In some embodiments, as shown inFIG.3A, the touch lead120includes a first leading-out line121and a second leading-out line122. A terminal of the first leading-out line121is electrically connected to the touch electrode110located in the first display region AA1, and another terminal of the first leading-out line121extends to the second display region AA2. A terminal of the second leading-out line122is electrically connected to a terminal of the first leading-out line121away from the touch electrode110, and another terminal of the second leading-out line122extends to a boundary between the second display region AA2 and the fan-out area BB. In addition, the second leading-out line122extends along an extending direction of an edge of the first display region AA1.

As can be seen from the description above, in the examples, the edge of the second display region AA2 proximate to the fan-out area BB coincides with the edge of the fan-out area BB proximate to the second display region AA2. In some examples, a terminal of the second leading-out line122away from the first leading-out line121may extend to an edge position where the second display region AA2 coincides with the fan-out area BB. In some other examples, a gap may also exist between the terminal of the second leading-out line122away from the first leading-out line121and the edge of the second display region AA2 coinciding with the fan-out area BB.

It will be understood that, the terminal of the first leading-out line121is located in the first display region AA1, so that the first leading-out line121can be electrically connected to the touch electrode110located in the first display region AA1; the another terminal of the first leading-out line121extends from the first display region AA1 to the second display region AA2; the terminal of the second leading-out line122is electrically connected to the first leading-out line121, and the another terminal of the second leading-out line122extends to the boundary between the second display region AA2 and the fan-out area BB. That is, the first leading-out line121and the second leading-out line122are both located in the display area AA (including the first display region AA1 and the second display region AA2).

In some examples, as shown inFIG.3A, lengths of second leading-out lines122gradually increase in the direction away from the display area AA. In some other examples, the lengths of the second leading-out lines122gradually decrease in the direction away from the display area AA.

In some examples, as shown inFIG.3A, the touch lead120further includes a third leading-out line127. The third leading-out line127is located in the fan-out area BB and electrically connected to the terminal of the second leading-out line122away from the first leading-out line121. In this way, an electrical signal can be transmitted between the fan-out area BB and the first display region AA1 through the first leading-out line121, the second leading-out line122and the third leading-out line127.

For example, as shown inFIG.3A, the second leading-out line122extends along the extending direction of the edge of the first display region AA1. That is, the extending direction of the second leading-out line122is parallel to the extending direction of the edge of the first display region AA1. With such an arrangement, the arrangement regularity of the second leading-out lines122can be improved. As a result, it is possible to reduce a space occupied by the second leading-out lines122, and reduce the risk that the second leading-out lines122are observed by naked eyes, thereby improving the display reliability of the touch display panel200. In addition, it is also possible to shorten a length of the second leading-out line122, thereby reducing the load of the touch lead120, and improving the transmission reliability of the signal.

In some examples, a sum of lengths of the first leading-out line121and the second leading-out line122in any one touch lead120is a first set length. As shown inFIG.3A, in the plurality of touch leads120, touch leads120having the greatest first set length are second touch leads124, and remaining touch leads120are first touch leads123.

In some examples, multiple second touch leads124are provided, and first set lengths of the multiple second touch leads124are substantially equal. Multiple first touch leads123are provided, and first set lengths of the multiple first touch leads123may be equal or unequal. It will be understood that a first set length of any one first touch lead123is less than a first set length of the second touch lead124.

In some examples, as shown inFIG.3A, the first touch lead123further includes a first compensation line125. The first compensation line125is located in the second display region AA2 and electrically connected to a first leading-out line121of the first touch lead123and/or a second leading-out line122of the first touch lead123.

In some examples, the first compensation line125is electrically connected to the first leading-out line121of the first touch lead123. In some other examples, the first compensation line125is electrically connected to the second leading-out line122of the first touch lead123. In yet other examples, the first compensation line125is electrically connected to terminals, electrically connected to each other, of the first leading-out line121and the second leading-out line122of the first touch lead123, so that the first compensation line125can be electrically connected to the first leading-out line121and the second leading-out line122of the first touch lead123.

It will be understood that, by arranging the first compensation line125to be electrically connected to the first leading-out line121of the first touch lead123and/or the second leading-out line122of the first touch lead123, it is possible to enable the electrical signal on the first leading-out line121and the second leading-out line122of the first touch lead123to be transmitted to the first compensation line125.

As can be seen from the description above, the first set length of the first touch lead123is less than the first set length of the second touch lead124. Therefore, by arranging the first compensation line125to be electrically connected to the first leading-out line121of the first touch lead123and/or the second leading-out line122of the first touch lead123, it is possible to enable the first compensation line125to compensate for the first touch lead123. As a result, an absolute value of a difference between the first set length of the second touch lead124and a sum of the first set length of the first touch lead123and a length of the first compensation line125is reduced. That is, an absolute value of a length difference between the portions of the plurality of touch leads120located in the display area AA can be reduced.

With such an arrangement, the length uniformity of the portions of the plurality of touch leads120located in the display area AA is improved, which improves the resistance uniformity of the plurality of touch leads120, and can also improve the uniformity of the parasitic capacitances formed between the plurality of touch leads120and another film layer (e.g., the cathode layer CTD in the display substrate210or the touch electrodes110located in the first display region AA1), so that the plurality of touch leads120can be arranged with equal capacitances. In this way, the load uniformity between the plurality of touch leads120can be improved, thereby improving the touch performance of the touch function layer100. As a result, the use performance of the touch display panel200is improved.

In some examples, a sum of lengths of the second leading-out line122and the first compensation line125of the first touch lead123is a second set length, and an absolute value of a difference between second set lengths of two first touch leads123is in a range of 0 mm to 4 mm, inclusive.

In some examples, an absolute value of a difference between second set lengths of any two first touch leads123is in the range of 0 mm to 4 mm, inclusive.

It will be understood that, the second leading-out line122and the first compensation line125of the first touch lead123are both located in the display area AA (the second display region AA2). Therefore, by setting the absolute value of the difference between the second set lengths of two first touch leads123to be in the range of 0 mm to 4 mm, inclusive, it is possible to improve the length uniformity of portions of the first touch leads123located in the display area AA (the second display region AA2).

In this way, it is possible to improve the resistance uniformity of the first touch leads123, and reduce the resistance difference between the first touch leads123; it is also possible to improve the uniformity of parasitic capacitances formed between the first touch leads123and another film layer (e.g., the cathode layer CTD in the display substrate210or the touch electrodes110located in the first display region AA1), so that the first touch leads123can be arranged with equal capacitances. In this way, the load uniformity of the first touch leads123can be improved, thereby improving the touch performance of the touch function layer100. As a result, the use performance of the touch display panel200is improved.

For example, the absolute value of the difference between the second set lengths of any two first touch leads123may be 0 mm, 1 mm, 2 mm, 3 mm, etc.

As can be seen from the description above, the first leading-out line121is included in the touch lead120(the touch leads120including the first touch leads123and the second touch leads124). In some examples, lengths of first leading-out lines121of the plurality of touch leads120(including the first touch leads123and the second touch leads124) are substantially equal, which improves the length uniformity of the portions of the plurality of touch leads120(including the first touch leads123and the second touch leads124) located in the display area AA, thereby improving the load uniformity of the plurality of touch leads120(including the first touch leads123and the second touch leads124). As a result, the touch performance of the touch function layer100is improved.

In some examples, the second set length of any one first touch lead123(i.e., the sum of the lengths of the second leading-out line122and the first compensation line125of the first touch lead123) is substantially equal to the length of the second leading-out line122of the second touch lead124.

With such an arrangement, the length uniformity of the portions of the plurality of touch leads120(including the first touch leads123and the second touch leads124) located in the display area AA can be improved, thereby improving the load uniformity of the plurality of touch leads120(including the first touch leads123and the second touch leads124). As a result, the touch performance of the touch function layer100is improved.

In some embodiments, as shown inFIG.3A, second set lengths of at least two first touch leads123are substantially equal.

For example, an absolute value of a difference between the second set lengths of the at least two first touch leads123may range from 0 mm to 3 mm (inclusive), 0 mm to 2 mm (inclusive), or 0 mm to 1 mm (inclusive).

For example, the absolute value of the difference between the second set lengths of the at least two first touch leads123may be 0.5 mm, 1.2 mm, 1.8 mm, or 2.2 mm, or the like.

In some examples, second set lengths of any two first touch leads123are substantially equal.

With such an arrangement, it may be possible to improve the resistance uniformity of the first touch leads123, and reduce the resistance difference between the first touch leads123; and it is also possible to improve the uniformity of parasitic capacitances formed between the first touch leads123and another film layer (e.g., the cathode layer CTD in the display substrate210or the touch electrodes110located in the first display region AA1), so that the first touch leads123can be arranged with equal capacitances. In this way, the load uniformity of the first touch leads123can be improved, thereby improving the touch performance of the touch function layer100. As a result, the use performance of the touch display panel200is improved.

In some embodiments, as shown inFIG.3A, the first touch leads123include a first first touch lead123aand a second first touch lead123b, and a first set length of the first touch lead123ais greater than a first set length of the second first touch lead123b. That is, a sum of lengths of a first leading-out line121and a second leading-out line122of the first touch lead123ais greater than a sum of lengths of a first leading-out line121and a second leading-out line122of the second first touch lead124b.

First compensation lines125includes a first first compensation line125aand a second first compensation line125b, and a length of the first first compensation line125ais less than a length of the second first compensation line125b. As shown inFIG.3A, the first first compensation line125ais electrically connected to the first first touch lead123a, and the second first compensation line125bis electrically connected to the second first touch lead123b.

That is, as shown inFIG.3A, a first compensation line125with a smaller length (the first first compensation line125a) is electrically connected to a first touch lead123with a greater first set length (the first first touch lead123a), and a first compensation line125with a greater length (the second first compensation line125b) is electrically connected to a first touch lead123with a smaller first set length (the second first touch lead123b).

In this way, the first compensation line125with the smaller length (the first first compensation line125a) can compensate for the first touch lead123with the greater first set length (the first first touch lead123a), and the first compensation line125with the greater length (the second first compensation line125b) can compensate for the first touch lead123with the smaller first set length (the second first touch lead123b), which improves the length uniformity of the first touch leads123, thereby improving the load uniformity of the first touch leads123. As a result, the touch performance of the touch function layer100is improved, and thus the use performance of the touch display panel200is improved.

In some embodiments, as shown inFIG.3A, first set lengths of touch leads120gradually increase in the direction away from the display area AA.

As can be seen from the description above, the first set length of the second touch lead124is greater than the first set length of any one first touch lead123. In this way, the first set lengths of the touch leads120are set to be gradually increased in the direction away from the display area AA, so that the second touch lead124is farther away from the display area AA than any one first touch lead123.

In addition, as can be seen from the description above, as shown inFIG.3A, the first compensation line125with the smaller length (the first first compensation line125a) is electrically connected to the first touch lead123with the greater first set length (the first first touch lead123a), and the first compensation line125with the greater length (the second first compensation line125b) is electrically connected to the first touch lead123with the smaller first set length (the second first touch lead123b). In this way, the first set lengths of the touch leads120are gradually increased in the direction away from the display area AA, so that lengths of first compensation lines125are gradually decreased in the direction away from the display area AA.

In some examples, the first set lengths of the touch leads120are gradually increased in an arithmetic progression in the direction away from the display area AA. That is, an absolute value of a difference between first set lengths of any two adjacent touch leads120in the direction away from the display area AA is equal. In some other examples, the absolute value of the difference between the first set lengths of any two adjacent touch leads120in the direction away from the display area AA may also be unequal.

It will be understood that, the first set lengths of the touch leads120are gradually increased in the direction away from the display area AA, which can avoid mutual interference generated when the touch leads120extend, and improve the arrangement convenience of the touch leads120. As a result, the processing convenience of the touch display panel200is improved.

In some embodiments, as shown inFIG.3A, at least part of an orthographic projection of the first compensation line125on display substrate210is located outside orthographic projections of the first leading-out lines121on the display substrate210and/or orthographic projections of the second leading-out lines122on display substrate210.

It will be understood that, the at least part of the orthographic projection of the first compensation line125on the display substrate210is located outside orthographic projections of first leading-out lines121of the first touch leads123on the display substrate210and/or orthographic projections of second leading-out lines122of the first touch leads123on the display substrate210; and the at least part of the orthographic projection of the first compensation line125on the display substrate210is located outside orthographic projections of first leading-out lines121of the second touch leads124on the display substrate210and/or orthographic projections of second leading-out lines122of the second touch leads124on the display substrate210.

With such an arrangement, it is possible to reduce parasitic capacitances generated between the first compensation line125and the first leading-out lines121and parasitic capacitances generated between the first compensation line125and the second leading-out lines122, thereby improving the capacitance uniformity of the first touch leads123, realizing the arrangement of the first touch leads123with equal capacitances, and improving the load uniformity of the first touch leads123. As a result, the touch performance of the touch function layer100is improved, and thus the use performance of the touch display panel200is improved.

FIG.3Bis another partial structural diagram of the touch function layer, in accordance with some embodiments;FIG.3Cis yet another partial structural diagram of the touch function layer, in accordance with some embodiments.

As can be seen from the description above, the first compensation line125is electrically connected to the first leading-out line121of the first touch lead123and/or the second leading-out line122of the first touch lead123. In some examples, as shown inFIG.3B, a terminal of the first compensation line125is electrically connected to the first leading-out line121of the first touch lead123and/or the second leading-out line122of the first touch lead123, and another terminal of the first compensation line125extends along a direction close to the fan-out area BB. In addition, the at least part of the orthographic projection of the first compensation line125on display substrate210is located outside the orthographic projections of the first leading-out lines121on display substrate210and/or the orthographic projections of the second leading-out lines122on display substrate210.

In some other examples, as shown inFIG.3C, a terminal of the first compensation line125is electrically connected to the second leading-out line122of the first touch lead123, and another terminal of the first compensation line125extends along a direction away from the fan-out area BB. In addition, the at least part of the orthographic projection of the first compensation line125on display substrate210is located outside the orthographic projections of the first leading-out lines121on display substrate210and/or the orthographic projections of the second leading-out lines122on display substrate210.

In some examples, as shown inFIG.3C, a first included angle α exists between the first leading-out line121and an end of the touch electrode110proximate to the first leading-out line121, and the first included angle α is an acute angle, which reduces a space occupied by the first leading-out line121in the first direction X1, and improves an area utilization rate of the second display region AA2.

FIG.3Dis yet another partial structural diagram of the touch function layer, in accordance with some embodiments.

In some embodiments, as shown inFIG.3D, the terminal of the second leading-out line122electrically connected to the first leading-out line121is a first connection terminal Q1.

It will be understood that, for each of the first touch lead123and the second touch lead124, a terminal of a second leading-out line122electrically connected to a terminal of a first leading-out line121is the first connection terminal Q1.

As shown inFIG.3D, for the first touch lead123, a terminal of the first compensation line125is electrically connected to the first connection terminal Q1, and another terminal of the first compensation line125extends along the extending direction of the edge of the first display region AA1 and along the direction away from the second leading-out line122.

As can be seen from the description above, as shown inFIG.3D, the terminal of the second leading-out line122away from the first leading-out line121extends to the boundary between the second display region AA2 and the fan-out area BB. Therefore, the terminal of the first compensation line125is arranged to be connected to the first connection terminal Q1, and the another terminal of the first compensation line125is arranged to extend along the direction away from the second leading-out line122, so that a terminal of the first compensation line125away from the first connection terminal Q1 can extend along the direction away from the fan-out area BB.

With such an arrangement, it is possible to reduce an overlapping area between the orthographic projection of the first compensation line125on the display substrate210and the orthographic projections of the first leading-out lines121on the display substrate210and an overlapping area between the orthographic projection of the first compensation line125on the display substrate210and the orthographic projections of the second leading-out lines122on the display substrate210, thereby reducing the parasitic capacitances generated between the first compensation line125and the first leading-out lines121and the parasitic capacitances generated between the first compensation line125and the second leading-out lines122, improving the capacitance uniformity of the first touch leads123, realizing the arrangement of the first touch leads123with equal capacitances, and improving the load uniformity of first touch leads123. As a result, the touch performance of the touch function layer100is improved, and thus the use performance of the touch display panel200is improved.

Moreover, the terminal of the first compensation line125away from the first connection terminal Q1 is arranged to extend along the direction away from the second leading-out line122, so that the first touch leads123can be uniformly distributed in the second display region AA2. As a result, it may be possible to reduce the space occupied by the first touch leads123in the first direction X1, improve the arrangement regularity of the first touch leads123, and reduce the risk that the second leading-out lines122and the first compensation lines125of the first touch leads123are observed by naked eyes, thereby improving the display performance of the touch display panel200.

In addition, as shown inFIG.3D, the terminal of the first compensation line125away from the first connection terminal Q1 is parallel to the extending direction of the edge of the first display region AA1. That is, an extending direction of the first compensation line125is parallel to the extending direction of the edge of the first display region AA1.

With such an arrangement, it is possible to improve the arrangement regularity of the first compensation lines125, reduce a space occupied by the first compensation lines125, and reduce the risk that the first compensation lines125are observed by naked eyes. Moreover, it is also possible to reduce the length of the first compensation line125, thereby reducing the load of the touch lead120. As a result, the transmission reliability of the signal is improved.

In some examples, the orthographic projection of the first compensation line125on the display substrate210may be in a shape of a straight line, a curved line or a polyline (e.g., a wave-shaped line or a saw-tooth line).

In some embodiments, as shown inFIG.3A, for first compensation lines125, orthographic projections, on the display substrate210, of terminals, which are each away from a respective first connection terminal Q1, of the first compensation lines125are substantially flush with each other.

As can be seen from the description above, second set lengths of the first touch leads123(i.e., each of the second set lengths being the sum of the lengths of the first compensation line125and the second leading-out line122of the first touch lead123) are substantially equal. In this way, by arranging the orthographic projections, on the display substrate210, of the terminals of the first compensation lines125that are each away from a respective first connection terminal Q1 to be substantially flush with each other, it is possible to improve the arrangement regularity of the first compensation lines125(i.e., the arrangement regularity of the first touch leads123) on the basis of improving the length uniformity of the portions of the first touch leads123located in the display area AA.

In some examples, orthographic projections of the first compensation lines125on the display substrate210each are in the shape of the straight line or approximate straight line, so that the orthographic projections, on the display substrate210, of the terminals of the first compensation lines125that are each away from a respective first connection terminal Q1 can be substantially flush with each other when the second set lengths of the first touch leads123(i.e., each of the second set lengths being the sum of the lengths of the first compensation line125and the second leading-out line122of the first touch lead123) are substantially equal.

With such an arrangement, it is possible to save the space occupied by the first touch leads123; and it may also be possible to improve the arrangement regularity of the first compensation lines125, so that the risk that the second leading-out lines122and the first compensation lines125of the first touch leads123are observed by naked eyes can be reduced. As a result, and the display performance of the touch display panel200is improved.

As can be seen from the description above, in the examples, the sum of the lengths of the second leading-out line122and the first compensation line125of the first touch lead123is the second set length. In some embodiments, as shown inFIG.3A, a length of the second leading-out line122of the second touch lead124is substantially equal to the second set length. That is, the length of the second leading-out line122of the second touch lead124is substantially equal to the sum of the lengths of the second leading-out line122and the first compensation line125of the first touch lead123.

For example, an absolute value of a difference between the length of the second leading-out line122of the second touch lead124and the second set length may range from 0 mm to 3 mm (inclusive), from 0 mm to 2 mm (inclusive), or from 0 mm to 1 mm (inclusive).

For example, the absolute value of the difference between the length of the second leading-out line122of the second touch lead124and the second set length may be 0.5 mm, 1.2 mm, 1.8 mm, 2.2 mm, or the like.

With such an arrangement, it is possible to improve the uniformity between the length of the portion of the first touch lead123located in the display area AA and the length of the portion of the second touch lead124located in the display area AA, that is, it is possible to improve the uniformity between the lengths of the portions of the plurality of touch leads120(including the first touch leads123and the second touch leads124) located in the display area AA. As a result, the load uniformity of the plurality of touch leads120(including the first touch leads123and the second touch leads124) is improved, and thus the touch performance of the touch function layer100is improved.

FIG.3Eis yet another partial structural diagram of the touch function layer, in accordance with some embodiments.

As can be seen from the description above, the length of the second leading-out line122of the second touch lead124is substantially equal to the second set length in the embodiments. In some other embodiments, as shown inFIG.3E, the second touch lead124further includes a second compensation line126. The second compensation line126is located in the second display region AA2 and electrically connected to the first leading-out line121of the second touch lead124and/or the second leading-out line122of the second touch lead124. A sum of lengths of the second leading-out line122and the second compensation line126of the second touch lead124is substantially equal to the second set length. That is, the sum of the lengths of the second leading-out line122and the second compensation line126of the second touch lead124is substantially equal to the sum of the lengths of the second leading-out line122and the first compensation line125of the first touch lead123.

For example, an absolute value of a difference between the second set length and the sum of the lengths of the second-out line122and the second compensation line126of the second contact lead124may range from 0 mm to 3 mm (inclusive), 0 mm to 2 mm (inclusive), or 0 mm to 1 mm (inclusive).

For example, the absolute value of the difference between the second set length and the sum of the lengths of the second-out line122and the second compensation line126of the second contact lead124may be 0.5 mm, 1.2 mm, 1.8 mm, 2.2 mm, or the like.

With such an arrangement, it is possible to improve the uniformity between the length of the portion of the first touch lead123located in the display area AA and the length of the portion of the second touch lead124located in the display area AA, that is, it is possible to improve the uniformity between the lengths of the portions of the plurality of touch leads120(including the first touch leads123and the second touch leads124) located in the display area AA. As a result, the load uniformity of the plurality of touch leads120(including the first touch leads123and the second touch leads124) is improved, and thus the touch performance of the touch function layer100is improved.

In some examples, the second compensation line126is electrically connected to the first leading-out line121of the second touch lead124. In some other examples, the second compensation line126is electrically connected to the second leading-out line122of the second touch lead124. In still other examples, the second compensation line126is electrically connected to a terminal of the second touch lead124where the first leading-out line121and the second leading-out line122are electrically connected (i.e., the first connection terminal Q1), so that the second compensation line126can be electrically connected to the first leading-out line121and the second leading-out line122of the second touch lead124.

In some embodiments, as shown inFIG.3E, at least part of an orthographic projection of the second compensating line126on display substrate210is located outside the orthographic projections of the first leading-out lines121on display substrate210and/or the orthographic projections of the second leading-out lines122on display substrate210.

In this way, it is possible to reduce the parasitic capacitances generated between the second compensation line126and the first leading-out lines121and/or parasitic capacitances generated between the second compensation line126and the second leading-out lines122, improve the capacitance uniformity of the plurality of touch leads120(including the first touch leads123and the second touch leads124), realize the arrangement of the plurality of touch leads120with equal capacitances, and improve the load uniformity of the plurality of touch leads120. As a result, the touch performance of the touch function layer100is improved, and thus the use performance of the touch display panel200is improved.

As can be seen from the description above, the terminal of the second leading-out line122electrically connected to the first leading-out line121is the first connection terminal Q1. In some examples, as shown inFIG.3E, for the second touch lead124, a terminal of the second compensation line126is electrically connected to the first connection terminal Q1, and another terminal of the second compensation line126extends along the extending direction of the edge of the first display region AA1 and along the direction away from the second leading-out line122.

With such an arrangement, it is possible to reduce an overlapping area between the orthographic projection of the second compensation line126on the display substrate210and the orthographic projections of the first leading-out lines121on the display substrate210and an overlapping area between the orthographic projection of the second compensation line126and the orthographic projections of the second leading-out lines122on the display substrate210, thereby reducing the parasitic capacitances generated between the second compensation line126and the first leading-out lines121and the parasitic capacitances generated between the second compensation line126and the second leading-out lines122, improving the capacitance uniformity of the plurality of touch leads120(including the first touch leads123and the second touch leads124), realizing the arrangement of the plurality of touch leads120with equal capacitances, and improving the load uniformity of the touch leads120. As a result, the touch performance of the touch function layer100is improved, and thus the use performance of the touch display panel200is improved.

Moreover, it is also possible to enable the second touch leads124to be uniformly distributed in the second display region AA2, thereby reducing a space occupied by the second touch leads124in the first direction X1, improving the arrangement regularity of the second touch leads124, and reducing the risk that the second leading-out lines122and the second compensation lines126of the second touch leads124are observed by naked eyes. As a result, the display performance of the touch display panel200is improved.

In addition, a terminal of the second compensation line126away from the first connection terminal Q1 extends along the extending direction of the edge of the first display region AA1. That is, an extending direction of the second compensation line126is parallel to the extending direction of the edge of the first display region AA1.

With such an arrangement, it is possible to improve the arrangement regularity of the second compensation lines126, reduce the space occupied by the second compensation lines126, reduce the risk that the second compensation lines126are observed by naked eyes, and reduces the length of the second compensation line126. As a result, the load of the touch lead120is reduced, and thus the transmission reliability of the signal is improved.

In some examples, as shown inFIG.3E, an orthographic projection, on the display substrate210, of the terminal of the second compensation line126away from the first connection terminal Q1 is substantially flush with the orthographic projection, on the display substrate210, of the terminal of the first compensation line125away from the first connection terminal Q1.

In some examples, the orthographic projection of the second compensation line126on the display substrate210is in a shape of a straight line or approximate straight line, so that the orthographic projection, on the display substrate210, of the terminal of the second compensation line126away from the first connection terminal Q1 can be substantially flush with the orthographic projection, on the display substrate210, of the terminal of the first compensation line125away from the first connection terminal Q1.

With such an arrangement, it is possible to save the space occupied by the second touch leads124; and it is also possible to improve the arrangement regularity of the second compensation lines126(i.e., the arrangement regularity of the plurality of touch leads120), and reduce the risk that the portions of the touch leads120(including the first touch leads123and the second touch leads124) located in the display area AA are observed by naked eyes. As a result, the display performance of the touch display panel200is improved.

FIG.4Ais yet another structural diagram of the touch display panel, in accordance with some embodiments.

In some embodiments, as shown inFIG.4A, the touch function layer100includes a first conductive layer130, a second conductive layer140and an insulating layer150. The first conductive layer130and the second conductive layer140are sequentially arranged. The insulating layer150is located between the first conductive layer130and the second conductive layer140.

It will be understood that, the first conductive layer130and the second conductive layer140are used for arranging the touch leads120or the touch electrodes110therein; the insulating layer150is located between the first conductive layer130and the second conductive layer140, and serves as an electrical isolation.

In some examples, as shown inFIG.4A, the first conductive layer130and the second conductive layer140are sequentially arranged on a surface of the encapsulation layer214of the display substrate210away from the substrate211. For example, a structure in which the first conductive layer130and the second conductive layer140are sequentially arranged on the surface of the encapsulation layer214away from the substrate211is referred to as a structure of flexible multi-layer on cell (FMLOC).

In some other examples, the display substrate210further includes a buffer layer215(not shown inFIG.4A, but referring toFIG.1B), the buffer layer215is located on the surface of the encapsulation layer214away from the substrate211, and the first conductive layer130and the second conductive layer140are sequentially arranged on a side of the buffer layer215away from the substrate211. With such an arrangement, it is possible to protect the encapsulating layer214, and prevent the encapsulation layer214from being damaged in a process of forming the touch function layer100.

The first conductive layer130and the second conductive layer140are sequentially arranged. In some examples, as shown inFIG.4A, the first conductive layer130is farther away from the substrate211than the second conductive layer140. In some other examples, the first conductive layer130is closer to the substrate211than the second conductive layer140.

As can be seen from the description above, the touch lead120includes the first leading-out line121and the second leading-out line122. The first leading-out line121further includes the first compensation line125. In some examples, as shown inFIG.4A, the first leading-out line121and the second leading-out line122are located in the first conductive layer130, and the first compensation line125is located in the second conductive layer140.

It will be understood that, as shown inFIG.4A, by arranging the first leading-out line121and the second leading-out line122in the first conductive layer130, and arranging the first compensation line125in the second conductive layer140, it is possible to avoid the mutual interference between the first leading-out line121and the first compensation line125and the mutual interference between the second leading-out line122and the first compensation line125during arrangement of the lines, and improve the arrangement convenience of the first leading-out line121, the second leading-out line122and the first compensation line125. The process is simple, and there is no need to add an additional mask and repeated etching, which improves the production efficiency of the touch display panel200, and reduces the production cost of the touch display panel200.

In addition, the first leading-out line121and the second leading-out line122are both arranged in the first conductive layer130, which improves the convenience of electrical connection between the first leading-out line121and the second leading-out line122, thereby improving the production efficiency of the touch display panel200, and reducing the cost of the touch display panel200.

As can be seen from the description above, the first compensation line125is electrically connected to the first leading-out line121of the first touch lead123and/or the second leading-out line122of the first touch lead123. In some examples, the insulating layer150is provided with fourth via holes (not shown in the figures) therein, and the first compensation line125is electrically connected to the first leading-out line121of the first touch lead123and/or the second leading-out line122of the first touch lead123through the fourth via hole. The operation is simple, and the implementation is easy. As a result, the production efficiency of the touch display panel200is improved, and the production cost of the touch display panel200is reduced.

As can be seen from the description above, in the examples, the second touch lead124includes the second compensation line126. For example, the second compensation line126is located in the second conductive layer140. That is, the second compensation line126is located in a conductive layer that is different from the first leading-out line121and the second leading-out line122. As a result, it may be possible to avoid the mutual interference between the second compensation line126and the first leading-out line121and the mutual interference between the second compensation line126and the second leading-out line122during the arrangement of the lines, and improve the arrangement convenience of the first leading-out line121, the second leading-out line122and the second compensation line126, thereby improving the processing convenience of the touch display panel200.

FIG.4Bis yet another structural diagram of the touch display panel, in accordance with some embodiments.

As can be seen from the description above, in the embodiments, as shown inFIG.4A, the first leading-out line121and the second leading-out line122are located in the first conductive layer130, and the first compensation line125is located in the second conductive layer140. In some other embodiments, as shown inFIG.4B, the first leading-out line121and the second leading-out line122are located in the first conductive layer130; the first compensation line125includes at least two first compensation sub-lines1251that are arranged at intervals and at least one first connection portion1252. The first compensation sub-lines1251are located in the first conductive layer130, and the at least one first connection portion1252is located in the second conductive layer140.

It will be understood that, lengths of the at least two first compensation sub-lines1251may be the same or different, and intervals between at least two first compensation sub-lines1251may be the same or different. It will be understood that, in a case where a plurality of first connection portions1252are provided, the plurality of first connection portions1252are all located in the second conductive layer140.

It will be understood that, as shown inFIG.4B, the first connection portion1252can be electrically connected to two adjacent first compensation sub-lines1251through first via holes in the insulating layer150, so that the electrical signal can be transmitted on the first compensation sub-lines1251through the first connection portion1252.

FIG.4Cis yet another partial structural diagram of the touch function layer, in accordance with some embodiments.

In some examples, as shown inFIG.4C, the first connection portion1252crosses the first leading-out line121. That is, an orthographic projection of first connection portion1252on display substrate210intersects the orthographic projection of the first leading-out line121on display substrate210.

For example, as shown inFIG.4C, in a case where the touch function layer100includes multiple first compensation lines125, first connection portions1252in different first compensation lines125may cross the same first leading-out line121.

It will be understood that, the first connection portion1252is arranged to be located in the second conductive layer140, the first leading-out line121, the second leading-out line122and the first compensation sub-lines1251are arranged to be located in the first conductive layer130, and the first connection portion1252can cross the first leading-out line121to be electrically connected to two adjacent first compensation sub-lines1251, which avoids the mutual interference between the first compensation line125(including the first compensation sub-lines1251and the first connection portion(s)1252) and the first leading-out line121and the mutual interference between the first compensation line125and the second leading-out line122during the arrangement of the lines, thereby improving the arrangement flexibility of the first leading-out line121, the second leading-out line122and the first compensation line125, and meeting different use requirements. Moreover, the process is simple, and there is no need to add an additional mask and repeated etching, which improves the production efficiency of the touch display panel200, and reduces the production cost of the touch display panel200.

As can be seen from the description above, as shown inFIG.3E, in the examples, the second compensation line126is included in the second touch lead124. In some examples, the second compensation line126includes a plurality of second compensation sub-lines that are arranged at intervals and second connection portion(s). The second compensation sub-lines are located in the first conductive layer130, and the second connection portion is located in the second conductive layer and crosses the first leading-out line121. The second connection portion is electrically connected to two adjacent second compensation sub-lines through third via holes (not shown in the figures) in the insulating layer150.

With such an arrangement, it may be possible to avoid the mutual interference between the second compensation line126(including the second compensation sub-lines and the second connection portion(s)) and the first leading-out line121and the mutual interference between the second compensation line126and the second leading-out line122during the arrangement of the lines, thereby improving the arrangement flexibility of the first leading-out line121, the second leading-out line122and the second compensation line126, and meeting different use requirements.

In some examples, as shown inFIGS.4A and4B, the first conductive layer130is farther away from the substrate211than the second conductive layer140. In this way, by arranging the first compensation line125(or the first compensation sub-lines1251of the first compensation line125), the first leading-out line121, and the second leading-out line122to be located in the first conductive layer130, it is possible to increase a distance between the conductive film layer216(e.g., the cathode layer CTD) of the display substrate210and each of the first compensation lines125(or the first compensation sub-lines1251of the first compensation line125), the first leading-out line121and the second leading-out line122, and reduce a parasitic capacitance formed between the conductive film layer216of the display substrate210and each of the first compensation lines125(or the first compensation sub-lines1251of the first compensation line125), the first leading-out line121and the second leading-out line122, thereby reducing the load of the touch lead120. As a result, the touch performance of the touch function layer100is improved, and thus the performance of the touch display panel200is improved.

As can be seen from the description above, as shown inFIG.1B, the plurality of touch electrodes110include the plurality of first touch electrodes111and the plurality of second touch electrodes112. The plurality of first touch electrodes111are arranged at intervals along the first direction X1, and all extend along the second direction Y1 intersecting the first direction X1. The plurality of second touch electrodes112are arranged at intervals along the second direction Y1, and all extend along the first direction X1. The plurality of second touch electrodes112and the plurality of first touch electrodes111cross each other and are insulated from each other, so as to constitute a capacitor unit113at each crossing position. The minimum closed pattern region where the plurality of capacitor units113are located as the whole is the first display region AA1.

For example, the second touch electrode112includes the plurality of touch sub-electrodes1121that are arranged at intervals and the plurality of bridging portions1122.

In some embodiments, as shown inFIG.1B, the plurality of first touch electrodes111are located in the first conductive layer130. The plurality of touch sub-electrodes1121are located in the first conductive layer130. The plurality of bridging portions1122are located in the second conductive layer140. The bridging portion1122crosses the first touch electrode111and is electrically connected to two adjacent touch sub-electrodes1121through second via holes in the insulating layer150.

It will be understood that, the bridging portion1122crosses the first touch electrode111, which means that, the orthographic projection of the bridging portion1122on the display substrate210intersects the orthographic projection of the first touch electrode111on the display substrate210. For example, as shown inFIG.1E, the orthographic projection of the bridging portion1122on the display substrate210intersects the orthographic projection of the connecting structure1112of the first touch electrode111on the display substrate210.

With such an arrangement, the electrical signal can be transmitted on the touch sub-electrodes1121through the bridging portion1122. In addition, the bridging portion1122is located in the second conductive layer140, and the first touch electrode111(including the touch structures1111and the connecting structures1112) and the touch sub-electrodes1121of the second touch electrode112are both located in the first conductive layer130, which avoids mutual interference between the connecting structure1112of the first touch electrode111and the bridging portion1122of the second touch electrode112when the first touch electrode111and the second touch electrode112extend, thereby improving the reliability of the touch function layer100.

In some examples, as shown inFIG.1B, the first conductive layer130is farther away from the substrate211than the second conductive layer140. In this way, by arranging the first touch electrode111(including the touch structures1111and the connecting structures1112) and the touch sub-electrodes1121of the second touch electrode112to be located in the first conductive layer130, it may be possible to increase a distance between the conductive film layer216(e.g., the cathode layer CTD) of the display substrate210and each of the first touch electrode111and the touch sub-electrodes1121of the second touch electrode112, and reduce a parasitic capacitance formed between the conductive film layer216(e.g., the cathode layer CTD) of the display substrate210and each of the first touch electrode111and the touch sub-electrodes1121of the second touch electrode112. As a result, the touch performance of the touch function layer100is improved, and thus the performance of the touch display panel200is improved.

As can be seen from the description above, as shown inFIGS.1A and1B, the display substrate210includes the substrate211. The plurality of sub-pixels220are located on the side of the substrate211and in the display area AA.

FIG.5Ais a diagram showing a projected positional relationship between the touch leads and the sub-pixels, in accordance with some embodiments;FIG.5Bis another diagram showing a projected positional relationship between the touch leads and the sub-pixels, in accordance with some embodiments.

In some embodiments, as shown inFIGS.5A and5B, an orthographic projection of at least one touch lead120on the substrate211avoids an orthographic projection of a light-emitting region of the sub-pixel220on the substrate211.

It will be understood that the sub-pixel220emits light outward through the light-emitting region. The orthographic projection of the at least one touch lead120on the substrate211avoids the orthographic projection of the light-emitting region of the sub-pixel220on the substrate211, which means that, the orthographic projection of the at least one touch lead120on the substrate211is not overlapped with the orthographic projection of the light-emitting region of the sub-pixel220on the substrate211, thereby reducing the shielding caused by the touch lead120arranged in the second display region AA2 to the light-emitting region of the sub-pixel220in the second display region AA2. As a result, the influence of the touch lead120on the image information displayed in the second display region AA2 is reduced, which improves the display reliability of the touch display panel200.

In some examples, as shown inFIG.5A, the orthographic projection of the at least one touch lead120on the substrate211is in a shape of a curve, such as a wave or approximate wave, so that the orthographic projection of the at least one touch lead120on the substrate211can avoid the orthographic projection of the light-emitting region of the sub-pixel220on the substrate211.

In some other examples, as shown inFIG.5B, at least one touch lead120is provided with through holes therein, and a position of the through hole corresponds to a position of the light-emitting region of the sub-pixel220, so that the orthographic projection of the at least one touch lead120on the substrate211can avoid the orthographic projection of the light-emitting region of the sub-pixel220on the substrate211.

In some embodiments, as shown inFIG.3E, a direction in which the display area AA and the fan-out area BB are arranged is a third direction Y2. A direction perpendicular to a thickness direction of the display substrate210and intersecting the third direction Y2 is a fourth direction X2. In some examples, the third direction Y2 is the vertical direction and the fourth direction X2 is the horizontal direction; the third direction Y2 is perpendicular to the fourth direction X2. For example, the third direction Y2 is parallel to the second direction Y1, and the fourth direction X2 is parallel to the first direction X1.

As shown inFIG.3E, at least part of the plurality of touch leads120are distributed on two sides of the first display region AA1 in the fourth direction X2, respectively. That is, the at least part of the plurality of touch leads120can extend to the fan-out area BB along portions of the second display regions AA2 located at two sides in the fourth direction X2, respectively, so that widths of frames of the touch display panel200at two sides in the fourth direction X2 can be reduced, and the uniformity of the widths of the frames of the touch display panel200at two sides in the fourth direction X2 can be improved. As a result, the visual effect of the touch display panel200is improved.

FIG.6is a structural diagram of a touch display apparatus, in accordance with some embodiments.

In another aspect, as shown inFIG.6, some embodiments of the present disclosure provide the touch display apparatus300. The touch display apparatus300includes the touch display panel200described above. Therefore, the touch display apparatus300has same beneficial effects as described above, and details will not be repeated here.

For example, the touch display apparatus300further includes the flexible printed circuit board, the driver IC and the touch IC. As can be seen from the description above, the flexible printed circuit board is bonded to connecting pins in the connecting area230; the driver IC is mounted on the flexible printed circuit board by using the COF process; the touch IC is mounted on the flexible printed circuit board by using the COF process. Alternatively, the touch IC may be mounted, by using the COP process, on the substrate211of the touch display substrate210located in the bonding area240; and the touch IC is electrically connected to connecting pins in the connecting area230.

It will be understood that, the touch display apparatus300is a product having an image display function. For example, the touch display apparatus300may be used to display a still image, such as the picture or photograph. The touch display apparatus300may also be used to display a dynamic image, such as a videos or game image.

In some examples, the display apparatus300may be a laptop computer, a mobile phone, a wireless apparatus, a personal data assistant (PDA), a hand-held or portable computer, a global positioning system (GPS) receiver/navigator, a camera, an MPEG-4 Part 14 (MP4) video player, a video camera, a game console, a watch, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, an automobile display (e.g., an odometer display), a navigator, a cockpit controller and/or display, a camera view display (e.g., a display of a rear-view camera in a vehicle), an electronic photo, an electronic billboard or signage, a projector, a packaging and aesthetic structure (e.g., a display for displaying an image of a piece of jewelry), etc.