CN117850627A

CN117850627A - OLED touch display panel and electronic equipment

Info

Publication number: CN117850627A
Application number: CN202410263433.XA
Authority: CN
Inventors: 张耀国; 俞丛晴; 倪瑞铭; 沈海峰; 李琛
Original assignee: Jige Semiconductor Ningbo Co ltd
Current assignee: Jige Semiconductor Ningbo Co ltd
Priority date: 2024-03-07
Filing date: 2024-03-07
Publication date: 2024-04-09

Abstract

The embodiment of the disclosure relates to the technical field of display, and provides an OLED touch display panel and electronic equipment, wherein the OLED touch display panel comprises: the touch screen comprises a TFT substrate, an OLED display layer, a touch layer, a plurality of first wires, a plurality of second wires, a plurality of first ground wires and a plurality of second ground wires, wherein the first wires are arranged at intervals along a first direction, the second wires are arranged at intervals along a second direction, the first ground wires are arranged at intervals along the first direction, the second ground wires are arranged at intervals along the second direction, the first ground wires are electrically connected with the corresponding first wires through first TFT switch tubes, and the second ground wires are connected with the corresponding second wires through second TFT switch tubes. The OLED touch display panel further comprises a controller for controlling the first TFT switch tube and the second TFT switch tube to be turned on or turned off in response to the control signals, and the embodiment of the disclosure at least realizes the electromagnetic capacitance induction compatibility requirement with low cost, and does not increase the process difficulty and the process cost of the OLED touch display panel.

Description

OLED touch display panel and electronic equipment

Technical Field

The embodiment of the disclosure relates to the technical field of display, in particular to an OLED touch display panel and electronic equipment.

Background

At present, electronic devices such as mobile phones and flat panels comprise an OLED (Organic Light-Emitting Diode) touch display panel to realize touch operation on the electronic devices. Touch technologies in OLED touch display panels generally include both electromagnetic induction touch and capacitive induction touch. When the OLED touch display panel adopts a capacitive sensing touch technology, a user can perform touch operation on the electronic equipment through a finger or a capacitive pen, and when the OLED touch display panel adopts an electromagnetic sensing touch technology, the user can perform touch operation on the electronic equipment through an electromagnetic pen.

However, there is a need to realize both capacitive sensing and electromagnetic sensing, that is, there is a greater need for the practicality of OLED touch display panels.

Disclosure of Invention

The embodiment of the disclosure provides an OLED touch display panel and electronic equipment, which can realize the electromagnetic capacitance induction compatibility requirement with low cost, and can not increase the process difficulty and the process cost of the OLED touch display panel.

According to some embodiments of the present disclosure, an aspect of embodiments of the present disclosure provides an OLED touch display panel, including: the OLED touch display panel includes: a TFT substrate having a driving circuit therein; the OLED display layer is positioned on the TFT substrate, and the driving circuit is used for driving the OLED display layer to emit light; the touch control layer is positioned on the surface of the OLED display layer, which is away from the TFT substrate; wherein, the touch layer includes: a plurality of first wires arranged at intervals along a first direction, the first wires extending along a second direction, the second direction being different from the first direction; the second wires are arranged at intervals along the second direction, extend along the first direction and are arranged in an insulating and crossing manner with the first wires; the first ground wires are arranged along the first direction at intervals, are positioned between adjacent first wires, correspond to the first wires one by one, and are electrically connected with the corresponding first wires through first TFT switch tubes; the second ground wires are arranged at intervals along the second direction, are positioned between the adjacent second wires, correspond to the second wires one by one, and are connected with the corresponding second wires through a second TFT switch; the first TFT switch tube and the second TFT switch tube are both positioned in the TFT substrate; and the controller is used for providing a control signal, the first TFT switch tube and the second TFT switch tube are turned on or off in response to the control signal, wherein the touch control layer executes electromagnetic induction operation during the on period of the first TFT switch tube and the second TFT switch tube, and the touch control layer executes capacitance induction operation during the off period of the first TFT switch tube and the second TFT switch tube.

In some embodiments, at least one first wire is arranged between the first wire and the corresponding first ground wire; at least one second wiring is arranged between the second wiring and the corresponding second ground wire.

In some embodiments, the number of first traces between the first trace and the corresponding first ground is greater than or equal to 2; the number of the second wires positioned between the second wires and the corresponding second ground wires is greater than or equal to 2.

In some embodiments, the number of the first wires between the first wires and the corresponding first ground wires is 2-8; the number of the second wires between the second wires and the corresponding second ground wires is 2-8.

In some embodiments, the first ground wire satisfies the following relationship: d1/3 is less than or equal to D1/D1 is less than or equal to 2/3, wherein D1 is the distance between the first ground wire and the adjacent first wiring, and D1 is the distance between the adjacent two first wirings; the second ground wire satisfies the following relationship: D2/D2 is more than or equal to 1/3 and less than or equal to 2/3, wherein D2 is the distance between the second ground wire and the adjacent second wiring, and D2 is the distance between the adjacent two second wirings.

In some embodiments, the first ground wire is located at a position directly between two adjacent first wires, and the second ground wire is located at a position directly between two adjacent second wires.

In some embodiments, the OLED touch display panel further includes: the first connecting wires are arranged along the second direction and are used for connecting the first wiring and the first ground wire, the first TFT switch tube is positioned on the first connecting wires, and the first connecting wires are positioned on the same side of all the second wirings; the second connecting wires are arranged along the first direction and are used for connecting the second wiring and the second ground wire, the second TFT switch tube is located on the second connecting wires, and the second connecting wires are located on the same side of all the first wiring.

In some embodiments, the touch layer further comprises: and the first ground wire and the second ground wire are electrically connected with the reference ground plane.

In some embodiments, the OLED display layer includes: the TFT substrate is sequentially provided with an anode layer, a light-emitting layer and a cathode layer, wherein the cathode layer is grounded; the first ground line is electrically connected with the cathode layer through a first conductive via hole, and the second ground line is electrically connected with the cathode layer through a second conductive via hole.

In some embodiments, the OLED touch display panel further includes: the first wiring is electrically connected with one end of the first TFT switch tube through the corresponding third conductive via hole, and the first ground wire is electrically connected with the other end of the first TFT switch tube through the corresponding third conductive via hole; the second wiring is electrically connected with one end of the second TFT switch tube through the corresponding fourth conductive via hole, and the second ground wire is electrically connected with the other end of the second TFT switch tube through the corresponding fourth conductive via hole; the third conductive via holes are all located on the same outer side of all the second wires, and the fourth conductive via holes are all located on the same outer side of all the first wires.

According to some embodiments of the present disclosure, another aspect of the embodiments of the present disclosure further provides an electronic device, including the OLED touch display panel described in the foregoing embodiments.

The technical scheme provided by the embodiment of the disclosure has at least the following advantages:

in the technical scheme of the OLED touch display panel provided by the embodiment of the disclosure, the OLED touch display panel includes: the OLED display comprises a TFT substrate, an OLED display layer and a touch control layer. The TFT substrate is internally provided with a driving circuit; the display layer is positioned on the TFT substrate, and the driving circuit is used for driving the OLED display layer to emit light; the touch control layer is positioned on the surface of the OLED display layer, which is away from the TFT substrate. Wherein, the touch layer includes: the first wires are arranged along the first direction at intervals and the second wires are arranged along the second direction at intervals, the first wires extend along the second direction, the second directions are different from the first directions, the second wires extend along the first direction, and the second wires and the first wires are arranged in an insulating and crossing mode. The touch layer further includes: the first ground wires are located between adjacent first running wires, the first ground wires are in one-to-one correspondence with the first running wires, the first ground wires are electrically connected with the corresponding first running wires through first TFT switch tubes, the second ground wires are located between adjacent second running wires, the second ground wires are in one-to-one correspondence with the second running wires, and the second ground wires are connected with the corresponding second running wires through second TFT switches. The first TFT switch tube and the second TFT switch tube are both positioned in the TFT substrate; and the controller is used for providing a control signal, the first TFT switch tube and the second TFT switch tube are turned on or off in response to the control signal, wherein the touch control layer performs electromagnetic induction operation during the on period of the first TFT switch tube and the second TFT switch tube, and performs capacitance induction operation during the off period of the first TFT switch tube and the second TFT switch tube. In the OLED touch display panel provided by the embodiment of the present disclosure, the touch layer may perform a corresponding electromagnetic induction operation or a capacitive induction operation through the first TFT switch tube and the second TFT switch tube, that is, the OLED touch display panel provided by the embodiment of the present disclosure may be compatible with the electromagnetic induction function or the capacitive induction function, and a user may use an electromagnetic pen to touch the OLED touch display panel, which has higher precision, and may also support a user to touch the OLED touch display panel with a finger. In addition, in the OLED touch display panel provided by the embodiment of the present disclosure, the first TFT switch tube is connected to the corresponding first ground wire and the first wiring, the second TFT switch tube is connected to the corresponding second ground wire and the second wiring, and the first TFT switch tube and the second TFT switch tube are compatible with electromagnetic induction functions or capacitance induction functions. In addition, the process for preparing the TFT switch tube in the TFT substrate is mature, and the first TFT switch tube and the second TFT switch tube are arranged in the TFT substrate, so that the process cost of the OLED touch display panel is not increased additionally. It can be appreciated that in the embodiment of the disclosure, the manufacturing process of the driving circuit in the TFT substrate is used to manufacture the first TFT switching tube and the second TFT switching tube, which does not bring additional cost, so that the additional process change and the cost increase are not brought under the condition that the requirements of capacitive sensing and electromagnetic sensing can be met.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically indicated otherwise; in order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the conventional technology, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.

FIG. 1 is a schematic diagram of an OLED touch display panel supporting only capacitive touch function in the related art;

FIG. 2 is a schematic diagram of a circuit structure inside the touch layer in FIG. 1;

FIG. 3 is a schematic diagram of an OLED touch display panel supporting only electromagnetic touch functions in the related art;

FIG. 4 is a schematic circuit diagram illustrating an inside of the touch layer in FIG. 3;

fig. 5 is a schematic diagram of an internal structure of an OLED touch display panel according to an embodiment of the disclosure;

fig. 6 is a schematic circuit diagram of an OLED touch display panel according to an embodiment of the disclosure;

Fig. 7 is a schematic diagram of a partial structure of an OLED touch display panel according to an embodiment of the disclosure;

fig. 8 is a schematic diagram of another partial structure of an OLED touch display panel according to an embodiment of the disclosure.

Detailed Description

Fig. 1 is a schematic structural diagram of an OLED touch display panel supporting only capacitive touch functions in the related art, and fig. 2 is a schematic circuit structure inside the touch layer in fig. 1.

Referring to fig. 1 and 2 simultaneously, the related art OLED touch display panel includes: TFT (Thin Film Transistor) base plate 100, OLED display layer 101 and touch-control layer 102, have drive circuit in the TFT base plate 100, OLED display layer 101 is located TFT base plate 100, and drive circuit is used for driving OLED display layer 101 to give out light, and touch-control layer 102 is located OLED display layer 101 and deviates from the surface of TFT base plate 100. Wherein, the touch layer 102 includes: a plurality of lateral electrodes Xn (n=natural numbers of 0, 1, 2, etc.) arranged at intervals along the first direction, the lateral electrodes Xn extending along a second direction, the second direction being different from the first direction; the OLED touch display panel further includes a controller (not shown) disposed between the longitudinal electrodes Yn and the lateral electrodes Xn in an insulating and crossing manner, the controller being connected to the lateral image electrodes Xn and the longitudinal electrodes Yn, and the controller being configured to detect a capacitance value between the lateral electrodes Xn and the longitudinal electrodes Yn and calculate coordinates of a touch position.

The TFT substrate 100 provides a supporting force for other components of the OLED touch display panel, and provides a driving circuit capable of driving the OLED display layer to emit light.

The OLED display layer 101 is configured to emit light driven by a driving circuit in the TFT substrate 100.

The transverse electrode Xn is used for forming a capacitance structure with the corresponding longitudinal electrode Yn, when a user uses a finger or a capacitance pen to perform touch operation on the OLED touch display panel, the capacitance of the capacitance structure formed by the transverse electrode Xn and the longitudinal electrode Yn near the touch position is changed, and the controller can calculate and obtain the coordinate of the touch position according to the capacitance value between the detected transverse electrode Xn and the longitudinal electrode Yn, however, the capacitance value between the transverse electrode Xn and the longitudinal electrode Yn is easily affected by external environment, so that the accuracy of identifying the touch position of the OLED touch display panel is lower.

Fig. 3 is a schematic structural diagram of an OLED touch display panel supporting only electromagnetic touch functions in the related art, and fig. 4 is a schematic circuit structure inside the touch layer in fig. 3.

Referring to fig. 3 and 4 simultaneously, the related art OLED touch display panel includes: the touch control device comprises a TFT substrate 200, an OLED display layer 201 and a touch control layer 202, wherein a driving circuit is arranged in the TFT substrate 200, the OLED display layer 201 is arranged on the TFT substrate 200, the driving circuit is used for driving the OLED display layer 201 to emit light, and the touch control layer 202 is arranged on the surface, away from the TFT substrate 200, of the OLED display layer 201. Wherein, the touch control layer 202 includes: a plurality of transverse coils An (n=positive integer of 1, 2, 3, etc.) arranged at intervals along a first direction, the second direction being different from the first direction; the plurality of longitudinal coils Bn (n=positive integers such as 1, 2, 3) arranged at intervals along the second direction, the longitudinal coils Bn and the transverse coils An are arranged in An insulating and crossing manner, the OLED touch display panel further comprises a controller 203, the controller 203 is connected with the transverse coils An and the longitudinal coils Bn, and the controller 203 is used for detecting magnetic flux distribution on the transverse coils An and the longitudinal coils Bn and calculating coordinates of touch positions.

The transverse coil An is used for generating a magnetic field, the longitudinal coil Bn is used for generating a magnetic field, when a user performs touch operation on the OLED touch display panel by using An electromagnetic pen, the electromagnetic pen sends An electromagnetic signal to change the magnetic flux of the magnetic fields of the adjacent transverse coil An and longitudinal coil Bn, and the controller 203 can calculate and obtain the coordinates of the touch position according to the magnetic flux distribution on the detected transverse coil An and longitudinal coil Bn. In the process, the magnetic flux distribution on the transverse coil An and the longitudinal coil Bn is only influenced by An electromagnetic pen, and the external environment is slightly disturbed, so that the accuracy of the OLED touch display panel in recognizing the touch position is low, however, the OLED touch display panel cannot support the touch of a user by using fingers, and the practicability is low.

In summary, although the OLED touch display panel only supporting the capacitive touch function in the related art may support the finger touch operation of the user, the accuracy is low, and the OLED touch display panel only supporting the electromagnetic touch function in the related art may not support the finger touch operation although the accuracy is high, so the practicability of the OLED touch display panel in the related art needs to be improved. In general, for the common OLED screen structure (namely an OLED touch display panel) at present, the touch layer and the display layer are close, when the display layer works, the touch is subjected to great display interference, and particularly for the scheme of an active capacitance pen, high-precision writing cannot be realized; for the scheme of the electromagnetic pen, the scheme of the electromagnetic pen has better anti-interference characteristics, but the scheme of the traditional electromagnetic pen has the following problems: firstly, an electromagnetic layer needs to be added in the screen body, which leads to the increase of the complexity and thickness of the screen body; the cost increases; secondly, an additional receiving channel is required; thus, the pins of the screen are doubled, and an additional integrated circuit is needed for processing the electromagnetic signals. This results in a need to reserve a large wiring space, with a large increase in cost.

Based on the above-mentioned problems, an embodiment of the present disclosure provides an OLED touch display panel, including: the OLED display comprises a TFT substrate, an OLED display layer and a touch control layer. The touch layer includes: the first wires are arranged along the first direction at intervals and the second wires are arranged along the second direction at intervals, the first wires extend along the second direction, the second wires extend along the first direction, the second direction is different from the first direction, and the second wires and the first wires are arranged in an insulating and crossing mode. The touch layer further includes: the first ground wires are located between adjacent first running wires, the first ground wires are in one-to-one correspondence with the first running wires, the first ground wires are electrically connected with the corresponding first running wires through first TFT switch tubes, the second ground wires are located between adjacent second running wires, the second ground wires are in one-to-one correspondence with the second running wires, and the second ground wires are connected with the corresponding second running wires through second TFT switches. The first TFT switch tube and the second TFT switch tube are both positioned in the TFT substrate. The touch layer further includes: and the controller is used for providing a control signal, the first TFT switch tube and the second TFT switch tube are turned on or off in response to the control signal, wherein the touch control layer performs electromagnetic induction operation during the on period of the first TFT switch tube and the second TFT switch tube, and performs capacitance induction operation during the off period of the first TFT switch tube and the second TFT switch tube.

In the OLED touch display panel provided by the embodiment of the present disclosure, the touch layer may perform corresponding electromagnetic induction operation or capacitance induction operation through the first TFT switch tube and the second TFT switch tube, so that a user may use an electromagnetic pen to touch the OLED touch display panel, which has higher precision, and may also support the user to touch the OLED touch display panel with a finger, which has higher convenience. In addition, compared with the OLED touch display panel compatible with the capacitive sensing function and the electromagnetic sensing function by adding the capacitive sensing layer or the electromagnetic sensing layer in the related art, the first ground line, the first routing, the second ground line and the second routing in the OLED touch display panel in the embodiment of the disclosure are all located in the touch layer, which is beneficial to the light and thin design of the OLED touch display panel. In addition, the process for preparing the TFT switch tube in the TFT substrate is mature, and the first TFT switch tube and the second TFT switch tube are arranged in the TFT substrate, so that the process cost of the OLED touch display panel is not increased additionally.

It can be appreciated that, in the OLED touch display panel provided by the embodiment of the present disclosure, the number of pins (i.e. pins) of the routing pin connected to the controller is not increased under the condition of not increasing the process complexity of the OLED touch display panel, and the complexity of the controller and the connecting wire required for correspondingly connecting to the controller are not increased, so that the problem of increased cost caused by the increased complexity of the controller and the connecting wire can be avoided.

Embodiments of the present disclosure will be described in detail below with reference to the attached drawings. However, those of ordinary skill in the art will understand that in the various embodiments of the present disclosure, numerous technical details have been set forth in order to provide a better understanding of the present disclosure. However, the technical solutions claimed in the present disclosure can be implemented without these technical details and with various changes and modifications based on the following embodiments.

Fig. 5 is a schematic diagram of an internal structure of an OLED touch display panel according to an embodiment of the disclosure, and fig. 6 is a schematic diagram of a circuit structure of an OLED touch display panel according to an embodiment of the disclosure.

Referring to fig. 5 and 6 simultaneously, the oled touch display panel includes: a TFT substrate 300, wherein a driving circuit is provided in the TFT substrate 300; the OLED display layer 301, the OLED display layer 301 is located on the TFT substrate 300, and the driving circuit is used for driving the OLED display layer 301 to emit light; the touch control layer 302, the touch control layer 302 is located on the surface of the OLED display layer 301 facing away from the TFT substrate 300; wherein, the touch layer 302 includes: a plurality of first wires 312 arranged at intervals along a first direction X, the first wires 312 extending along a second direction Y, the second direction Y being different from the first direction X; the second wires 322 are arranged at intervals along the second direction Y, the second wires 322 extend along the first direction X, and the second wires 322 and the first wires 312 are arranged in an insulating and crossing manner; the first ground wires 332 are arranged at intervals along the first direction X, the first ground wires 332 are located between adjacent first wires 312, the first ground wires 332 are in one-to-one correspondence with the first wires 312, and the first ground wires 332 are electrically connected with the corresponding first wires 312 through the first TFT switching tubes 310; the second ground wires 342 are arranged along the second direction Y at intervals, the second ground wires 342 are located between adjacent second wires 322, the second ground wires 342 are in one-to-one correspondence with the second wires 322, and the second ground wires 342 are connected with the corresponding second wires 322 through the second TFT switching tubes 320; wherein, the first TFT switching tube 310 and the second TFT switching tube 320 are both located in the TFT substrate 300; the controller 303 is configured to provide a control signal, and the first TFT switch tube 310 and the second TFT switch tube 320 are turned on or off in response to the control signal, wherein the touch layer 302 performs an electromagnetic induction operation during an on period of the first TFT switch tube 310 and the second TFT switch tube 320, and the touch layer 302 performs a capacitance induction operation during an off period of the first TFT switch tube 310 and the second TFT switch tube 320.

The OLED touch display panel can also be an AMOLED (Active Matrix/Organic Light Emitting Diode) touch display panel. The TFT substrate 300 provides supporting force for other components of the OLED touch display panel, and a driving circuit capable of driving the OLED display layer 301 to emit light is provided inside the TFT substrate 300.

The OLED display layer 301 is configured to emit light driven by a driving circuit in the TFT substrate 300.

The touch layer 302 is used for sensing a touch operation of a user.

The first wires 312 extend along the second direction Y, the second wires 322 extend along the first direction X, the extending direction of the first wires 312 is different from the extending direction of the second wires 322, when the controller 303 controls the first TFT switch tube 310 and the second TFT switch tube 320 to be disconnected, the first wires 312 are used for forming a capacitive structure with the corresponding second wires 322, the touch layer 302 performs capacitive sensing operation, at this time, when a user uses a finger or a capacitive pen to perform touch operation on the OLED touch display panel, the capacitance of the capacitive structure formed by the first wires 312 and the second wires 322 near the touch position is changed, and the controller 303 can detect the capacitance value between the first wires 312 and the second wires 322 and calculate the coordinates of the touch position.

In some embodiments, the first direction X may be perpendicular to the second direction Y. In some embodiments, the first direction and the second direction may not be perpendicular. The first ground wires 332 are in one-to-one correspondence with the first wires 312, the first ground wires 332 are used for forming an inductance coil with the first wires 312, the second ground wires 342 are in one-to-one correspondence with the second wires 322, the second ground wires 342 are used for forming an inductance coil with the second wires 322, the first ground wires 332 are electrically connected with the corresponding first wires 312 through the first TFT switch tube 310, the second ground wires 342 are connected with the corresponding second wires 322 through the second TFT switch tube 320, when the controller 303 controls the first TFT switch tube 310 and the second TFT switch tube 320 to be conducted, the touch control layer 302 executes electromagnetic induction operation, at the moment, when a user uses an electromagnetic pen to perform touch control operation on the OLED touch control display panel, the electromagnetic pen sends electromagnetic signals to change magnetic fluxes on the adjacent first wires 312, the first ground wires 332, the second wires 322 and the second ground wires 342, the controller 303 can detect distribution of the magnetic fluxes on the first wires 312, the first ground wires 332, the second wires 322 and the second ground wires 342, and calculate coordinates of touch control positions.

The material of the first trace 312 may be the same as the material of the corresponding first ground line 332, and the material of the second trace 322 may be the same as the material of the corresponding second ground line 342. In this way, the first wiring 213 and the first ground line 332 can be wired by the same wiring process, and the second wiring 322 and the second ground line 342 can be wired by the same wiring process.

It is understood that in other embodiments, the material of the first trace 312 may also be different from the material of the first ground line 332, e.g., the resistivity of the material of the first trace 312 is greater than the resistivity of the material of the first ground line 332. Similarly, the material of the second trace 322 may also be different from the material of the second ground line 342, e.g., the resistivity of the material of the second trace 322 is greater than the resistivity of the material of the second ground line 342.

Specifically, according to the magnetic flux of the coil formed by the first trace 312 and the first ground wire 332 and the coil adjacent to the coil in the same direction, the coordinate of the electromagnetic pen in the transverse direction can be calculated according to the centroid algorithm; similarly, the longitudinal coordinates of the electromagnetic pen can be calculated according to the magnetic fluxes of the coils formed on the second wiring 322 and the second ground wire 342 and the coils adjacent in the same direction; and according to the transverse and longitudinal coordinate information, acquiring the position of the pen point, and realizing high-precision writing.

In some embodiments, at least one first trace 312 is provided between the first trace 312 and the corresponding first ground line 332, so that the arrangement can ensure that when the touch layer 302 is touched by a user using an electromagnetic pen under electromagnetic induction operation, the magnetic flux of an electromagnetic coil formed on the first trace 312 and the corresponding first ground line 332 near the touch position can be changed, and the controller 303 can position the coordinates of the touch position according to the changed magnetic flux, thereby being beneficial to improving the reliability of the OLED touch display panel and realizing reliable coordinate positioning of the electromagnetic pen in the corresponding extending direction of the first trace 312. At least one second wiring 322 is arranged between the second wiring 322 and the corresponding second ground wire 342, so that the arrangement can ensure that the magnetic flux of the electromagnetic coil formed on the second wiring 322 near the touch position and the corresponding second ground wire 342 can be changed when a user uses an electromagnetic pen to perform touch operation on the touch layer 302 under electromagnetic induction operation, and the controller 303 can position the coordinates of the touch position according to the changed magnetic flux, thereby being beneficial to improving the reliability of the OLED touch display panel and realizing reliable coordinate positioning of the electromagnetic pen in the corresponding extending direction of the second wiring 322.

The number of first traces 312 between the first traces 312 and the corresponding first ground lines 332 may be greater than or equal to 2. The number of second traces 322 between the second traces 322 and the corresponding second ground lines 342 may be greater than or equal to 2.

In some embodiments, the number of first traces 312 between the first traces 312 and the corresponding first ground lines 332 may be 2-8, such as 2, 3, 4 or 5. The number is in the range, so that the situation that the span range of the electromagnetic coil formed by the first wire 312 and the first ground wire 332 is too large due to the fact that the number is too large, and the precision of the electromagnetic coil formed by the first wire 312 and the first ground wire 332 is easily interfered by the first wire 312 can be avoided, and the reliability of the OLED touch display panel can be improved. The number of the electromagnetic wires is within the range, so that the magnetic flux of the electromagnetic coil formed on the first wiring 312 and the corresponding first ground wire 332 near the touch position can be changed when the touch layer 302 is touched by a user through an electromagnetic pen under electromagnetic induction operation, and the reliability of the OLED touch display panel can be improved.

In addition, in some embodiments, the number of the first traces 312 between the first traces 312 and the corresponding first ground lines 332 may be 3-5. The number of the first wires 312 between the first wires 312 and the corresponding first ground wires 332 is within the above range, that is, the electromagnetic coil span range formed by the first wires 312 and the first ground wires 332 is more reasonable, so that the electromagnetic induction effect is better. Specifically, when an electromagnetic pen approaches a screen body (namely an OLED touch display panel), adjacent electromagnetic coil signals are generally influenced at the same time, and when the spans of different electromagnetic coils are too large, signals received by the electromagnetic coils near the electromagnetic pen are relatively close, and the degree of distinction is low, so that the positioning of coordinates by a centroid algorithm is not facilitated; if the number of the first wires 312 between the first wires 312 and the corresponding first ground wires 332 is too small, the number of the electromagnetic coils receiving the electromagnetic signals is too small, which is also unfavorable for the centroid algorithm to acquire coordinates, and influences the positioning accuracy.

It should be further noted that, the distance between two adjacent first wires 312 is between 3mm and 8mm, for example, may be 4mm, 5mm, 7mm, etc., if the distance is too large, the positioning accuracy will be affected, and if the distance is too small, the same screen size will require more wires and pins, which will increase the wiring difficulty and the cost of the integrated circuit. It can be appreciated that, in some embodiments, the number of the first wires 312 between the first wires 312 and the corresponding first ground wires 332 may be 3-5, and the interval between two adjacent first wires 312 is 3-8 mm, so that the electromagnetic induction effect is good and the wiring difficulty and cost are not increased.

The number of second wires 322 between the second wires 322 and the corresponding second ground wires 342 may be 2-8, such as 2, 3, 4 or 5. The number is in the range, so that the situation that the span range of the electromagnetic coil formed by the second wiring 322 and the second ground wire 342 is too large due to the fact that the number is too large, the accuracy of the electromagnetic coil formed by the second wiring 322 and the second ground wire 342 is interfered by the second wiring 322 can be avoided, the reliability of the OLED touch display panel can be improved, the number is in the range, the touch layer 302 can be ensured to be in electromagnetic induction operation, and when a user uses an electromagnetic pen to perform touch operation on the touch layer 302, the magnetic flux of the electromagnetic coil formed on the second wiring 322 near the touch position and the corresponding second ground wire 342 can be changed, so that the reliability of the OLED touch display panel can be improved.

In addition, in some embodiments, the number of the first traces 312 between the second traces 322 and the corresponding second ground lines 342 may be 3-5. The number of the second wires 322 between the second wires 322 and the corresponding second ground wires 342 is within the above range, that is, the electromagnetic coil span range formed by the second wires 322 and the second ground wires 342 is more reasonable, so that the electromagnetic induction effect is better. Specifically, when an electromagnetic pen approaches a screen body (namely an OLED touch display panel), adjacent electromagnetic coil signals are generally influenced at the same time, and when the spans of different electromagnetic coils are too large, signals received by the electromagnetic coils near the electromagnetic pen are relatively close, and the degree of distinction is low, so that the positioning of coordinates by a centroid algorithm is not facilitated; if the number of the second wires 322 between the second wires 322 and the corresponding second ground wires 342 is too small, the number of the electromagnetic coils receiving the electromagnetic signals is too small, which is not beneficial to the centroid algorithm to acquire the coordinates, and influences the positioning accuracy.

It should be further noted that, the distance between two adjacent second wires 322 is between 3mm and 8mm, for example, may be 4mm, 5mm, 7mm, etc., if the distance is too large, the positioning accuracy will be affected, and if the distance is too small, the same screen size will require more wires and pins, which will increase the wiring difficulty and the cost of the integrated circuit. It can be appreciated that, in some embodiments, the number of the second wires 322 between the second wires 322 and the corresponding second ground wires 342 may also be 3-5, and the space between two adjacent second wires 322 is 3-8 mm, which can achieve the effects of good electromagnetic induction effect and no increase of wiring difficulty and cost.

In some embodiments, the first ground line 332 satisfies the following relationship: 1/3.ltoreq.d1/d1.ltoreq.2/3, where D1 is the distance between the first ground wire 332 and the adjacent first wires 312, D1 is the distance between the adjacent two first wires 312, and the position of the first ground wire 332 between the adjacent two first wires 312 is within this range, so that the interference of the first ground wire 332 on the adjacent first wires 312 is small, and thus the reliability of the OLED touch display panel can be improved. The second ground line 342 satisfies the following relationship: 1/3.ltoreq.d2/d2.ltoreq.2/3, where D2 is the distance between the second ground wire 342 and the adjacent second wires 322, and D2 is the distance between the adjacent two second wires 322. The position of the second ground wire 342 between two adjacent second wirings 322 is within this range, so that the interference of the second ground wire 342 on the adjacent second wirings 322 is small, and the touch accuracy of the OLED touch display panel can be improved.

In some embodiments, the first ground wire 332 is located at a position right between two adjacent first wires 312, where the interference degree of the first ground wire 332 to the two adjacent first wires 312 is the same or equivalent, and the interference of the first ground wire 332 to the first wires 312 can be counteracted, so that the reliability of the OLED touch display panel can be improved. The second ground line 342 is located at a position right intermediate between two adjacent second traces 322. At this time, the interference degree of the second ground wire 342 to the adjacent two second wires 322 is the same or equivalent, and the interference of the second ground wire 342 to the second wires 322 can be counteracted, so as to improve the touch accuracy of the OLED touch display panel.

In some examples, the width of the first ground line 332 may be greater than or equal to the width of the first trace 312, so that interference caused by the first ground line 332 may be further reduced. Similarly, the width of the second ground line 342 may be greater than or equal to the width of the second trace 322, so that the interference caused by the second ground line 342 may be further reduced.

In some embodiments, the OLED touch display panel further includes: a plurality of first connection lines 352 arranged along the second direction Y, the first connection lines 352 being used for connecting the first wirings 312 and the first ground lines 332, the first TFT switching tubes 310 being located on the first connection lines 352, the plurality of first connection lines 352 being located on a same side of all the second wirings 322; the second connecting wires 362 are arranged along the first direction X, the second connecting wires 362 are used for connecting the second wires 322 and the second ground wires 342, the second TFT switching tube 320 is located on the connecting wires, and the second connecting wires 362 are located on the same side of all the first wires 312.

It will be appreciated that the touch layer 302 may be divided into a display area and a non-display area, where the display area is used for a user to touch, the non-display area is used for providing a space for sealing connection between other components in the OLED touch display panel, the first connection line 352 is used for connecting the first trace 312 and the first ground line 332, the first connection lines 352 are located on a same side of all the second traces 322, and the first TFT switch tube 310 is located on the first connection line 352, so that the first TFT switch tube 310 does not occupy the positions of the first trace 312 and the first ground line 332, the first trace 312 and the first ground line 332 are located in the display area, so that the first TFT switch tube 310 may not occupy the positions of the touch layer 302, which is beneficial to improving the screen ratio of the OLED touch display panel, the second connection line 362 is used for connecting the second trace 322 and the second ground line 342, the second connection lines 362 are located on a same side of all the first trace 312, and the second TFT switch tube 320 is located on the second connection line 362, so that the second TFT switch tube 320 does not occupy the positions of the first trace 312 and the first ground line 332, and the second TFT switch tube 320 occupies the positions of the touch display area, which are beneficial to improve the screen ratio of the touch display area 302.

It will be appreciated that, in some examples, the first connection line 352 may not be provided to connect the first trace 312 and the first ground line 332, the first trace 312 and the first ground line 332 may be directly connected, and the plurality of first TFT switching tubes 310 may be disposed on the same side of all the second traces 322, or the second connection line 362 may not be provided to connect the second trace 322 and the second ground line 342, and the second trace 322 and the second ground line 342 may be directly connected, and the plurality of second TFT switching tubes 320 may be disposed on the same side of all the first traces 312.

In some embodiments, the touch layer 302 further includes: the first ground line 332 and the second ground line 342 are electrically connected to a reference ground plane (not shown). By the arrangement, the first ground wire 332 and the second ground wire 342 are not required to be connected with the ground plane in the controller 303, so that pins of the controller 303 can be saved, the cost of the OLED touch display panel can be reduced, wiring in the OLED touch display panel is simple, and the screen ratio of the OLED touch display panel is improved.

In some embodiments, the OLED display layer 301 includes: an anode layer 311, a light emitting layer 321, and a cathode layer 313 sequentially disposed on the TFT substrate 300, wherein the cathode layer 313 is grounded; the first ground line 332 is electrically connected to the cathode layer 313 via a first conductive via (not shown), and the second ground line 342 is electrically connected to the cathode layer 313 via a second conductive via (not shown).

The anode layer 311 and the cathode layer 313 are used to connect with a driving circuit in the TFT substrate 300, when the driving circuit is applied with a forward voltage, electrons and holes are respectively injected into the light emitting layer 321 from the cathode and the anode under the action of an applied electric field, then the electrons and the holes migrate in the light emitting layer 321, and then meet and combine to form excitons, the excitons transfer energy to light emitting molecules in the light emitting layer 321, so that the excited electrons are changed from a ground state to an excited state, and finally the excited state energy is de-excited to generate photons, so that the light emitting layer 321 emits light. The cathode layer 313 is connected to the reference ground, the first ground wire 332 is electrically connected to the cathode layer 313 through the first conductive via hole, and the second ground wire 342 is electrically connected to the cathode layer 313 through the second conductive via hole, so that not only can the connection pins of the controller 303 be saved and the wiring in the OLED touch display panel be simplified, the screen duty ratio of the OLED touch display panel be improved, and the cost of the OLED touch display panel be reduced, but also the grounding connection setting of the first ground wire 332 and the second ground wire 342 can be directly completed by using the existing cathode layer 313 without setting an additional reference ground plane, and the cost of the OLED touch display panel can be further reduced.

In some embodiments, the TFT substrate 300 may include: a substrate 330 and a third TFT switching tube 340, the third TFT switching tube 340 being disposed on the substrate 330, the third TFT switching tube 340 being connected to the anode layer 311 for driving the light emitting layer 321 to emit light. When the third TFT switching tube 340 is turned on, the anode layer 311 is applied with a forward voltage, the light emitting layer 321 emits light, and when the third TFT switching tube 340 is turned off, no voltage is applied to the anode layer 311, and the light emitting layer 321 does not emit light. The OLED display layer 301 may further include: conductive plugs 314, interlayer dielectric layers 315, and pixel definition layers (Pixel Definition Layer, PDL) 316. The conductive plug 314 is used for electrically connecting the third TFT switch tube 340 and the anode layer 311, the interlayer dielectric layer 315 is located between the anode layer 311 and the third TFT switch tube 340, and is used for electrically insulating the third TFT switch tube 340 and other layers such as the pixel definition layer 316, and the pixel definition layer 316 is used for dividing the pixel light emitting units in the light emitting layer 321 and reducing color mixing between adjacent pixel light emitting units. The OLED touch display panel may further include: the buffer layer 304 and the transparent cover plate 305, the buffer layer 304 is located between the cathode layer 313 and the transparent cover plate 305, and is used for buffering and protecting the cathode layer 313. The transparent cover plate 305 is used for protecting other components of the OLED touch display panel.

It will be appreciated that fig. 5 illustrates a case where the touch layer 302 is located between the transparent cover 305 and the buffer layer 304, and in fact, the touch layer 302 may also be located inside the transparent cover 305, and the positional relationship between the touch layer 302 and the transparent cover 305 and the buffer layer 304 is not limited in the embodiments of the present disclosure.

Fig. 7 is a schematic diagram of a partial structure of an OLED touch display panel according to an embodiment of the disclosure, and fig. 8 is a schematic diagram of another partial structure of an OLED touch display panel according to an embodiment of the disclosure.

Referring also to fig. 6 to 8, in some embodiments, the OLED touch display panel further includes: a plurality of third conductive vias 306, the first trace 312 is electrically connected to one end of the first TFT switching tube 310 via the corresponding third conductive via 306, and the first ground line 332 is electrically connected to the other end of the first TFT switching tube 310 via the corresponding third conductive via 306; the plurality of fourth conductive vias 307, the second trace 322 is electrically connected to one end of the second TFT switching tube 320 via the corresponding fourth conductive via 307, and the second ground line 342 is electrically connected to the other end of the second TFT switching tube 320 via the corresponding fourth conductive via 307; the third conductive vias 306 are all located on the same outer side of all the second traces 322, and the fourth conductive vias 307 are all located on the same outer side of all the first traces 312.

The third conductive via 306 is used for connecting the first ground line 332, the first trace 312 and the first TFT switch tube 310, and the third conductive via 306 is disposed on the same outer side of all the second traces 322, so that the third conductive via 306 can be prevented from occupying the positions of the first trace 312 and the first ground line 332, and the second trace 322 is located in the display area of the touch layer 302, so that the third conductive via 306 can not occupy the position of the display area of the touch layer 302, thereby being beneficial to improving the screen occupation ratio of the OLED touch display panel.

The fourth conductive via 307 is used for connecting the second ground wire 342, the second trace 322 and the second TFT switch tube 320, and the fourth conductive via 307 is disposed on the same outer side of all the first traces 312, so that the fourth conductive via 307 can be prevented from occupying the positions of the second trace 322 and the second ground wire 342, and the first trace 312 is located in the display area of the touch layer 302, so that the fourth conductive via 307 can not occupy the position of the display area of the touch layer 302, thereby being beneficial to improving the screen occupation ratio of the OLED touch display panel.

In the above-mentioned OLED touch display panel, the touch layer 302 may perform a corresponding electromagnetic induction operation or a capacitive induction operation through the first TFT switch tube 310 and the second TFT switch tube 320, that is, the OLED touch display panel provided in the embodiment of the present disclosure may be compatible with the electromagnetic induction function or the capacitive induction function, so that a user may use an electromagnetic pen to touch the OLED touch display panel, which has higher precision, and may also support the user to touch the OLED touch display panel with a finger, which has higher convenience. In addition, compared to the OLED touch display panel compatible with the capacitive sensing function and the electromagnetic sensing function by adding the capacitive sensing layer or the electromagnetic sensing layer in the related art, the first ground line 332, the first trace 312, the second ground line 342 and the second trace 322 in the OLED touch display panel of the embodiment of the disclosure are all located in the touch layer 302, which is beneficial to the light and thin design of the OLED touch display panel. In addition, the process of preparing the TFT switching tube in the TFT substrate 300 is mature, and the first TFT switching tube 310 and the second TFT switching tube 320 are disposed in the TFT substrate 300, so that the process cost of the OLED touch display panel is not additionally increased.

Correspondingly, another embodiment of the disclosure further provides an electronic device having the OLED touch display panel according to any one of the embodiments. The same or corresponding parts as those of the previous embodiment may be referred to for corresponding description of the previous embodiment, and detailed description thereof will be omitted.

The electronic device can be a product with a display function and a touch control function such as a mobile phone, a computer, electronic paper, a display, a notebook computer, a digital photo frame and the like.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and the scope of the disclosure should therefore be assessed as that of the appended claims.

Claims

1. An OLED touch display panel, comprising:

a TFT substrate having a driving circuit therein;

the OLED display layer is positioned on the TFT substrate, and the driving circuit is used for driving the OLED display layer to emit light;

The touch control layer is positioned on the surface of the OLED display layer, which is away from the TFT substrate; wherein, the touch layer includes:

a plurality of first wires arranged at intervals along a first direction, the first wires extending along a second direction, the second direction being different from the first direction;

the second wires are arranged at intervals along the second direction, extend along the first direction and are arranged in an insulating and crossing manner with the first wires;

the first ground wires are arranged along the first direction at intervals, are positioned between adjacent first wires, correspond to the first wires one by one, and are electrically connected with the corresponding first wires through first TFT switch tubes;

the second ground wires are arranged at intervals along the second direction, are positioned between the adjacent second wires, correspond to the second wires one by one, and are connected with the corresponding second wires through a second TFT switch;

the first TFT switch tube and the second TFT switch tube are both positioned in the TFT substrate;

And the controller is used for providing a control signal, the first TFT switch tube and the second TFT switch tube are turned on or off in response to the control signal, wherein the touch control layer executes electromagnetic induction operation during the on period of the first TFT switch tube and the second TFT switch tube, and the touch control layer executes capacitance induction operation during the off period of the first TFT switch tube and the second TFT switch tube.

2. The OLED touch display panel according to claim 1, wherein at least one first trace is disposed between the first trace and the corresponding first ground line; at least one second wiring is arranged between the second wiring and the corresponding second ground wire.

3. The OLED touch display panel according to claim 2, wherein the number of first wires between the first wires and the corresponding first ground wire is greater than or equal to 2; the number of the second wires positioned between the second wires and the corresponding second ground wires is greater than or equal to 2.

4. The OLED touch display panel according to claim 3, wherein the number of the first wires between the first wires and the corresponding first ground wires is 2-8; the number of the second wires between the second wires and the corresponding second ground wires is 2-8.

5. The OLED touch display panel of claim 1, wherein the first ground line satisfies the following relationship: d1/3 is less than or equal to D1/D1 is less than or equal to 2/3, wherein D1 is the distance between the first ground wire and the adjacent first wiring, and D1 is the distance between the adjacent two first wirings; the second ground wire satisfies the following relationship: D2/D2 is more than or equal to 1/3 and less than or equal to 2/3, wherein D2 is the distance between the second ground wire and the adjacent second wiring, and D2 is the distance between the adjacent two second wirings.

6. The OLED touch display panel of claim 5, wherein the first ground line is located at a position directly between two adjacent first traces and the second ground line is located at a position directly between two adjacent second traces.

7. The OLED touch display panel of claim 1, further comprising:

the first connecting wires are arranged along the second direction and are used for connecting the first wiring and the first ground wire, the first TFT switch tube is positioned on the first connecting wires, and the first connecting wires are positioned on the same side of all the second wirings;

The second connecting wires are arranged along the first direction and are used for connecting the second wiring and the second ground wire, the second TFT switch tube is located on the second connecting wires, and the second connecting wires are located on the same side of all the first wiring.

8. The OLED touch display panel of claim 1, wherein the touch layer further comprises:

and the first ground wire and the second ground wire are electrically connected with the reference ground plane.

9. The OLED touch display panel of claim 1, wherein the OLED display layer comprises:

the TFT substrate is sequentially provided with an anode layer, a light-emitting layer and a cathode layer, wherein the cathode layer is grounded;

the first ground line is electrically connected with the cathode layer through a first conductive via hole, and the second ground line is electrically connected with the cathode layer through a second conductive via hole.

10. The OLED touch display panel of claim 1, further comprising:

the first wiring is electrically connected with one end of the first TFT switch tube through the corresponding third conductive via hole, and the first ground wire is electrically connected with the other end of the first TFT switch tube through the corresponding third conductive via hole;

The second wiring is electrically connected with one end of the second TFT switch tube through the corresponding fourth conductive via hole, and the second ground wire is electrically connected with the other end of the second TFT switch tube through the corresponding fourth conductive via hole;

the third conductive via holes are all located on the same outer side of all the second wires, and the fourth conductive via holes are all located on the same outer side of all the first wires.

11. An electronic device comprising the OLED touch display panel of any one of claims 1-10.