CN111966242A

CN111966242A - Touch display panel and display device

Info

Publication number: CN111966242A
Application number: CN202010826581.XA
Authority: CN
Inventors: 刘明; 刘政; 孟秋华; 田宏伟
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-11-20
Anticipated expiration: 2040-08-17
Also published as: CN111966242B

Abstract

The disclosure relates to a touch display panel and a display device, and relates to the technical field of touch. The touch display panel comprises a display substrate, a plurality of first touch components, a plurality of second touch components and a control component, wherein the display substrate is provided with a display area and a frame area surrounding the display area; the first touch control assemblies are arranged in the frame area and are arranged at intervals along the row direction; each first touch control assembly comprises a first transmitting unit and a first receiving unit which are distributed at two sides of the display area along the row direction; the second touch control assemblies are arranged in the frame area and are arranged at intervals along the row direction; each second touch control assembly comprises a second transmitting unit and a second receiving unit which are distributed on two sides of the display area along the row direction; the control assembly is used for controlling the first transmitting unit and the second transmitting unit to transmit ultrasonic waves and determining the position of the touch area according to the ultrasonic waves of the fingers reflected from the touch area and received by the first receiving unit and the second receiving unit; the first transmitting unit and the second transmitting unit transmit ultrasonic waves with different frequencies.

Description

Touch display panel and display device

Technical Field

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

Background

Currently, touch technologies have been widely applied to various electronic devices for human-computer interaction. However, in the prior art, a user needs to directly touch the touch display panel with a finger or a stylus to determine the position of the touch area, so as to implement the touch operation.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to overcome the above-mentioned deficiencies in the prior art, and to provide a touch display panel and a display device, which can realize floating touch.

According to an aspect of the present disclosure, there is provided a touch display panel including:

the display device comprises a display substrate, a display unit and a display unit, wherein the display substrate is provided with a display area and a frame area surrounding the display area;

the plurality of first touch control assemblies are arranged in the frame area and are arranged at intervals along the row direction; each first touch control assembly comprises a first transmitting unit and a first receiving unit which are distributed on two sides of the display area along the row direction;

the second touch control assemblies are arranged in the frame area and are arranged at intervals along the row direction; each second touch control assembly comprises a second transmitting unit and a second receiving unit which are distributed on two sides of the display area along the row direction;

the control assembly is used for controlling the first transmitting unit and the second transmitting unit to transmit ultrasonic waves and determining the position of the touch area according to the ultrasonic waves of the fingers reflected from the touch area and received by the first receiving unit and the second receiving unit; the frequencies of the ultrasonic waves transmitted by the first transmitting unit and the second transmitting unit are different;

the position of the touch area includes a position of the touch area in the row direction, the column direction, and a direction perpendicular to the display substrate.

In an exemplary embodiment of the present disclosure, the first transmitting unit includes a first transmitting magnetic part and a first transmitting coil distributed in a direction perpendicular to the display substrate; the first receiving unit comprises a first receiving magnetic piece and a first receiving coil which are distributed along the direction vertical to the display substrate;

the first transmitting coil is positioned within the magnetic field generated by the first transmitting magnetic element; the first receiving coil is positioned within the magnetic field generated by the first receiving magnetic member;

the control assembly is used for applying an alternating current signal to the first transmitting coil and determining the position of the touch area in the column direction according to the induction signal of the first receiving coil.

In an exemplary embodiment of the present disclosure, the second transmitting unit includes a second transmitting magnetic member and a second transmitting coil distributed in a direction perpendicular to the display substrate; the second receiving unit comprises a second receiving magnetic piece and a second receiving coil which are distributed along the direction vertical to the display substrate;

the second transmitting coil is positioned within the magnetic field generated by the second transmitting magnetic element; the second receiving coil is positioned within the magnetic field generated by the second receiving magnetic member;

the control component is used for applying an alternating current signal to the second transmitting coil and determining the position of the touch area in the row direction according to the induction signal of the second receiving coil.

In an exemplary embodiment of the present disclosure, the control component is configured to determine a position of the touch area in a direction perpendicular to the display substrate according to an induction signal of at least one of the first receiving coil and the second receiving coil.

In an exemplary embodiment of the present disclosure, the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil each include a plurality of layers of coil bodies connected in series, and each of the coil bodies has a ring-shaped structure having a gap.

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

the driving back plate comprises a pixel circuit area positioned in the display area and an edge area positioned in the frame area;

the light-emitting device layer comprises a first electrode layer, a light-emitting layer and a second electrode layer which are sequentially stacked along the direction departing from the driving backboard; the orthographic projection of the light-emitting device layer on the driving back plate is positioned in a range surrounded by the edge zone;

the driving back plate is provided with a slope corresponding to the area of each coil body; the coil bodies are arranged on the slopes in a one-to-one correspondence mode and arranged on the same layer as the first electrode layer.

the driving back plate comprises a pixel circuit area positioned in the display area and an edge area positioned in the frame area; the driving back plate comprises a substrate and at least one thin film transistor which is arranged on the substrate and is positioned in the pixel circuit area, the thin film transistor comprises a dielectric layer and a source drain layer which is positioned on the surface of the dielectric layer, which is far away from the substrate, and the source drain layer comprises a source electrode and a drain electrode;

the light-emitting device layer is arranged on one side of the driving back plate, and the orthographic projection of the light-emitting device layer on the driving back plate is positioned in the range surrounded by the edge region;

the region of the dielectric layer corresponding to each coil body is provided with a slope; the coil bodies are arranged on the slopes in a one-to-one correspondence mode and are arranged on the same layer as the source drain layer.

In an exemplary embodiment of the present disclosure, each of the first transmitting magnetic members is the same magnetic member; each first receiving magnetic piece is the same magnetic piece; each second transmitting magnetic part is the same magnetic part; each second receiving magnetic part is the same magnetic part.

In an exemplary embodiment of the present disclosure, the number of coil bodies of the first transmitting coil and the first receiving coil is the same, and is a first number;

the number of coil bodies of the second transmitting coil and the second receiving coil is the same and is a second number;

the first number is different from the second number.

According to an aspect of the present disclosure, there is provided a display device including the touch display panel described in any one of the above.

The touch display panel and the display device can realize touch operation under the condition that a finger is not in contact with the display substrate, namely, realize suspension touch. Specifically, during touch control, a finger is located in a touch control area above the display substrate and can reflect ultrasonic waves emitted by the first emitting unit and the second emitting unit, and the first receiving unit and the second receiving unit receive the reflected ultrasonic waves, so that not only the position of the touch control area in the row direction and the column direction but also the position of the touch control area in the direction perpendicular to the display substrate can be determined according to the received ultrasonic waves, and thus the spatial position of one or more fingers relative to the display substrate is determined, and multi-point floating touch control is realized.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a top view of a touch display panel according to an embodiment of the disclosure.

FIG. 2 is a schematic cross-sectional view E-E of FIG. 1.

FIG. 3 is a schematic cross-sectional view of one of F-F of FIG. 1.

FIG. 4 is another schematic cross-sectional view E-E of FIG. 1.

FIG. 5 is another schematic cross-sectional view E-E of FIG. 1.

Fig. 6 is a schematic diagram of a first transmitting coil in an embodiment of a touch display panel according to the disclosure.

Fig. 7 is a schematic circuit block diagram of an embodiment of a touch display panel according to the present disclosure.

Description of reference numerals:

1. a display substrate; 11. driving the back plate; 101. a substrate; 102. an active layer; 103. a gate insulating layer; 104. a gate electrode; 105. a dielectric layer; 106. a planarization layer; 107. a source electrode; 108. a drain electrode; 12. a light emitting device layer; 121. a first electrode layer; 122. a pixel defining layer; 123. a light emitting layer; 124. a second electrode layer; 13. a slope; 2. a first touch control component; 21. a first transmitting unit; 211. a first transmitting coil; 212. a first transmitting magnetic member; 22. a first receiving unit; 221. a first receiving coil; 222. a first receiving magnetic member; 3. a second touch control component; 31. a second transmitting unit; 311. a second transmitting coil; 312. a second transmitting magnetic member; 32. a second receiving unit; 321. a second receiving coil; 322. a second receiving magnetic member; 200. a coil body; 4. and a control component.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first" and "second" are used merely as labels, and are not limiting on the number of their objects.

The present disclosure provides a touch display panel, as shown in fig. 1 and 7, the touch display panel may include a display substrate 1, a first touch device 2, and a second touch device 3, wherein:

the display substrate 1 is provided with a display area A and a frame area B surrounding the display area A;

the number of the first touch control assemblies 2 is multiple, the first touch control assemblies are arranged in the frame area B, and the first touch control assemblies 2 are arranged at intervals along the row direction; each first touch assembly 2 includes a first transmitting unit 21 and a first receiving unit 22 distributed at two sides of the display area a along the row direction.

The number of the second touch control assemblies 3 is multiple, the second touch control assemblies are arranged in the frame area B, and the second touch control assemblies 3 are arranged at intervals along the row direction; each of the second touch assemblies 3 includes a second transmitting unit 31 and a second receiving unit 32 distributed at both sides of the display area a along the column direction.

The control component 4 is configured to control the first transmitting unit 21 and the second transmitting unit 31 to transmit ultrasonic waves, and determine the position of the touch area according to the ultrasonic waves reflected from the finger in the touch area received by the first receiving unit 22 and the second receiving unit 32; the first transmitting unit 21 and the second transmitting unit 31 transmit ultrasonic waves at different frequencies.

The position of the touch area includes positions of the touch area in a row direction, a column direction, and a direction perpendicular to the display substrate 1.

The touch display panel of the embodiment of the present disclosure can implement touch operation, that is, floating touch, when a finger contacts the display substrate 1 with a certain distance. Specifically, during touch control, a finger may be located in a touch area on the light emitting side of the display substrate and may reflect the ultrasonic waves emitted by the first emitting unit 21 and the second emitting unit 31, and the first receiving unit 22 and the second receiving unit 32 receive the reflected ultrasonic waves, so that not only the position of the touch area in the row direction and the column direction but also the position of the touch area in the direction perpendicular to the display substrate 1 may be determined according to the received ultrasonic waves, thereby determining the spatial position of one or more fingers relative to the display substrate 1, and implementing multi-point floating touch.

In the embodiments of the present disclosure, the column direction and the row direction are used to indicate two directions perpendicular to each other, and the row direction is not limited to the horizontal direction and the column direction is not limited to the vertical direction. As will be appreciated by those skilled in the art, after rotating the touch display panel, the actual orientation of the column direction and the row direction will change accordingly. In fig. 1, the X direction schematically shows the row direction, and the Y direction schematically shows the column direction.

The following describes each part of the touch display panel according to the embodiments of the present disclosure in detail:

as shown in fig. 1, the display substrate 1 may have a display area a and a frame area B, wherein at least a partial area of the display area a is used for emitting light to one side, that is, to a light emitting side, to display an image. The frame area B surrounds the display area a, does not display images, and can be covered by the frame.

In some embodiments of the present disclosure, as shown in fig. 2-5, the display substrate 1 may include a driving backplane 11 and a light emitting device layer 12, wherein:

the driving back plate 11 may be divided into at least a pixel circuit region located in the display region a and an edge region located in the frame region B along an extension direction of the driving back plate 11.

In a direction perpendicular to the driving backplane 11, the driving backplane 11 may include a substrate 101 and a pixel circuit disposed on one side of the substrate 101, where the pixel circuit includes a driving transistor, and the driving transistor is a thin film transistor, for example, a thin film transistor with a top gate type is used as the driving transistor: the driving backplane 11 may include a substrate 101, an active layer 102, a gate insulating layer 103, a gate 104, a dielectric layer 105, a source drain layer, and a planarization layer 106, wherein:

the active layer 102 may be provided on one side of the substrate 101. The gate insulating layer 103 covers the active layer 102 and the substrate 101. The gate electrode 104 is disposed on a surface of the gate insulating layer 103 facing away from the substrate 101 and opposite to the active layer 102. A dielectric layer 105 covering the gate electrode 104 and the gate insulating layer 103; the source-drain layer is provided on a surface of the dielectric layer 105 facing away from the substrate 101, and includes a source 107 and a drain 108 connected to the active layer 102 through a via, the drain 108 for connecting to the light emitting device layer 12, and the source 107 for receiving a driving signal. A planarization layer 106 may cover the source drain layer and the dielectric layer 105. Of course, the driving backplane 11 may also include other film layers, which are not listed here, and the driving transistor may also be a bottom gate type thin film transistor.

As shown in fig. 2-5, the light emitting device layer 12 may comprise a first electrode layer 121, a light emitting layer 123 and a second electrode layer 124, which are sequentially stacked in a direction away from the driving back plate 11. Meanwhile, the light emitting device layer 12 may further include a pixel defining layer 122, which may be disposed on the driving back plate 11 and expose the first electrode layer 121 for defining a plurality of light emitting devices. The orthographic projection of the light-emitting device layer 12 on the driving back plate 11 is located in the range surrounded by the edge region, and the edge region is exposed, so that the edge region of the driving back plate 11 is the frame region B of the display substrate 1, and the edge region does not emit light. The Light Emitting device layer 12 may have a plurality of Light Emitting devices, which are OLED (Organic Light-Emitting Diode) Light Emitting devices, each of which includes a first electrode layer 121, a Light Emitting layer 123, and a second electrode layer 124, and the Light Emitting layer 123 may be made to emit Light by applying a driving signal to the first electrode layer 121 and the second electrode layer 124.

In addition, the display substrate 1 may further include a peripheral area surrounding the display area a, and the frame area B surrounds the peripheral area, and accordingly, the driving backplane 11 may further include a peripheral circuit area located in the peripheral area, the peripheral circuit area surrounds the pixel circuit area, and has a peripheral circuit connected to the pixel circuit, and the peripheral circuit may include a gate driving circuit, a light emitting control circuit, and the like, which are not limited herein.

As shown in fig. 1 to fig. 5, the first touch device 2 is disposed in the frame area B, and the number of the first touch device is plural, and the specific number is not limited herein. Each first touch control assembly 2 can be arranged at intervals along the column direction; each first touch assembly 2 includes a first transmitting unit 21 and a first receiving unit 22, wherein:

the first emitting units 21 and the first receiving units 22 are distributed at both sides of the display area a in the row direction and are linearly distributed in the row direction. The first transmission unit 21 may transmit an ultrasonic wave, and a propagation range of the transmitted ultrasonic wave covers the display area a. When a user performs a touch operation, if a finger is located in an area capable of reflecting ultrasonic waves, the area where the finger is located, i.e., the touch area, may reflect the ultrasonic waves, and the reflected ultrasonic waves may be received by the first receiving unit 22 and generate a sensing signal, so that the first receiving unit 22 that receives the ultrasonic waves may be determined according to the sensing signal, and then a position of the touch area in a column direction, i.e., a position in a Y direction in fig. 1, may be determined.

In some embodiments of the present disclosure, as shown in fig. 1-5, the first transmitting unit 21 may include a first transmitting coil 211 and a first transmitting magnetic piece 212, wherein:

the first transmitting coils 211 and the first transmitting magnetic members 212 may be distributed in a direction perpendicular to the display substrate 1. For example, the first emitting coil 211 is disposed on a side of the substrate 101 close to the light emitting device layer 12, and the first emitting magnetic element 212 may be attached or otherwise fixed to a side of the substrate 101 away from the light emitting device layer 12.

The first transmitting coil 211 may include a plurality of coil bodies 200 connected in series, each coil body 200 has a ring structure with a gap, the number of the gaps is one, and the size of the gap is not particularly limited, for example, the coil body 200 may have an arc structure and a major arc. The coil bodies 200 of the same first transmission coil 211 may be distributed in the row direction.

In order to facilitate the arrangement of the first radiation coil 211, the coil bodies 200 may be arranged on the slopes 13 in a one-to-one correspondence, the slope 13 is an inclined surface inclined with respect to the substrate 101, and the slope angle is not particularly limited as long as the coil bodies 200 can be supported.

The orientation of the ramp 13 is not particularly limited herein, for example: the bottom of the slope 13 may be located on a side of the top portion near the display area a, or the bottom of the slope 13 may be located on a side of the top portion facing away from the display area a.

In some embodiments of the present disclosure, a slope 13 may be provided at a region of the driving back plate 11 corresponding to each coil body 200, for example: as shown in fig. 2 and 3, the planarization layer 106 may extend to the frame region B, and the slope 13 may be formed in a region of the frame region B where the planarization layer 106 is located by a gray scale mask process. Of course, the slope 13 may also be obtained by directly forming a wedge-shaped groove in the flat layer 106, where the slope 13 is a sidewall of the wedge-shaped groove. The material of the planarization layer 106 may be an organic material, and after the input of the alternating electric signal to the first radiation coil 211 is stopped, the first radiation coil 211 may be buffered to stop the vibration in time, thereby stopping the emission of the ultrasonic wave.

As shown in fig. 6, the coil bodies 200 are provided on the slopes 13 in a one-to-one correspondence, and the coil bodies 200 can be connected in series to form the first radiation coil 211 with both ends of the notch of each coil body 200 being used as connection ends. Meanwhile, in order to simplify the process, the coil body 200 of each first radiation coil 211 and the first electrode layer 121 may be disposed in the same layer, that is, the first coil body 200 and the first electrode layer 121 may be made of the same material and may be formed at the same time. Further, the lead wires of the series coil body 200 may be formed at the same time as the coil body 200, but the slope 13 may not be formed at the lead wires.

In other embodiments of the present disclosure, as shown in fig. 4 and 5, the slopes 13 may be disposed on the dielectric layer 105, the coil bodies 200 of the first radiation coils 211 may be disposed on the slopes 13 in a one-to-one correspondence manner, and in order to simplify the process, the coil bodies 200 may be disposed on the same layer as the source/drain layer, that is, the first coil body 200 and the source/drain layer may be made of the same material and may be formed at the same time.

In addition, in other embodiments of the present disclosure, each coil body 200 may also be formed simultaneously with the gate electrode 104 or other conductive film layer of the display substrate 1.

As shown in fig. 2 to 5, the first transmitting magnetic member 212 may be a permanent magnet or an electromagnet as long as a magnetic field can be generated, and the first transmitting coil 211 is in the magnetic field of the first transmitting magnetic member 212. In order to simplify the structure and facilitate the installation, each of the first transmitting magnetic members 212 may be the same magnet, that is, the first transmitting coils 211 may share the same first transmitting magnetic member 212 and be located in the same magnetic field. Further, an orthographic projection of the first transmitting coil 211 on the substrate 101 may be located within an orthographic projection of the first transmitting magnetic element 212 on the substrate 101.

When the alternating electric signal is input to the first transmitting coil 211, the first transmitting coil 211 may generate vibration by the magnetic field, and the vibration of the first transmitting coil 211 may generate ultrasonic waves by controlling the frequency of the alternating electric signal.

As shown in fig. 2 to 5, the first receiving unit 22 may include a first receiving coil 221 and a first receiving magnetic member 222, wherein:

the first receiving coil 221 and the first receiving magnetic member 222 may be distributed in a direction perpendicular to the display substrate 1. For example, the first receiving coil 221 is disposed on a side of the substrate 101 close to the light emitting device layer 12, and the first receiving magnetic member 222 is disposed on a side of the substrate 101 away from the light emitting device layer 12 by means of adhesion or the like.

The first receiving coil 221 may have the same structure as the first transmitting coil 211, and may also include a plurality of layers of coil bodies 200 connected in series, each coil body 200 has a ring-shaped structure with a gap, and the coil bodies 200 of the same first receiving coil 221 may be distributed in the row direction.

The respective coil bodies 200 of the first receiving coil 221 may be disposed on the plurality of slopes 13 in a one-to-one correspondence, and the slopes 13 of the coil bodies 200 supporting the first receiving coil 221 may be disposed on the same layer as the slopes 13 supporting the first transmitting coil 211, on the flat layer 106, the dielectric layer 105, or the like. The first receiving coil 221 may be disposed in the same layer as the first emitting coil 211, and the first receiving coil 221 and the ramp 13 may be disposed in a manner similar to the first emitting coil 211, which will not be described in detail herein. The orientations of the ramps 13 supporting the first transmission coil 211 and the first reception coil 221 may be the same or different.

The first receiving magnetic member 222 may be a permanent magnet or an electromagnet as long as it can generate a magnetic field, and the first receiving coil 221 is located within the magnetic field of the first receiving magnetic member 222. For the sake of simple structure and easy installation, each first receiving magnetic member 222 may be the same magnet, that is, the first receiving coils 221 may share the same first receiving magnetic member 222 and be in the same magnetic field. Further, the orthographic projection of the first receiving coil 221 on the substrate 101 may be located within the orthographic projection of the first receiving magnetic member 222 on the substrate 101.

The ultrasonic wave reflected to the first receiving coil 221 may vibrate the first receiving coil 221, and under the action of the magnetic field, an induction signal may be generated, and the induction signal may determine the corresponding first receiving coil 221, so as to determine the position of the touch area in the column direction, i.e., the position in the Y direction.

As shown in fig. 1-5, the number of the second touch devices 3 disposed in the frame area B is also plural, but not limited to the same as the number of the second touch devices 3. The second touch control components 3 are arranged at intervals along the row direction; each second touch assembly 3 includes a second transmitting unit 31 and a second receiving unit 32, wherein:

the second transmitting unit 31 and the second receiving unit 32 are distributed in the column direction at both sides of the display area a. The second transmitting unit 31 may emit an ultrasonic wave, and a propagation range of the emitted ultrasonic wave covers the display area a. When the user performs a touch operation, if the finger is located in an area capable of reflecting the ultrasonic waves, the area where the finger is located, i.e., the touch area, may reflect the ultrasonic waves, and the reflected ultrasonic waves may be received by the second receiving unit 32 and generate a sensing signal, so that the second receiving unit 32 that receives the ultrasonic waves may be determined according to the sensing signal, and then a position of the touch area in the row direction, i.e., a position in the X direction, may be determined.

In some embodiments of the present disclosure, as shown in fig. 1-5, the second transmitting unit 31 may include a second transmitting coil 311 and a second transmitting magnetic member 312, wherein:

the second transmitting coil 311 and the second receiving magnetic member 322 may be distributed in a direction perpendicular to the display substrate 1. For example, the second transmitting coil 311 is disposed on a side of the substrate 101 close to the light emitting device layer 12, and the second receiving magnetic member 322 may be disposed on a side of the substrate 101 away from the light emitting device layer 12 by attaching or the like.

The second transmitting coil 311 may have the same structure as the first transmitting coil 211, and may also include a plurality of layers of coil bodies 200 connected in series, each coil body 200 has a ring-shaped structure with a gap, and the coil bodies 200 of the same second transmitting coil 311 may be distributed in the row direction.

The coil bodies 200 of the second transmitting coil 311 may be disposed on the plurality of slopes 13 in a one-to-one correspondence, and the slopes 13 supporting the coil bodies 200 of the second transmitting coil 311 may be disposed on the same layer as the slopes 13 supporting the first transmitting coil 211, such as on the flat layer 106 or the dielectric layer 105. The second transmitting coil 311 may be disposed in the same layer as the first transmitting coil 211, and the detailed arrangement of the second transmitting coil 311 and the ramp 13 may refer to the first transmitting coil 211, which is not described in detail herein.

The second transmitting magnetic member 312 may be a permanent magnet or an electromagnet as long as it can generate a magnetic field, and the second transmitting coil 311 is in the magnetic field of the second transmitting magnetic member 312. For simplicity of structure and convenience of installation, each second transmitting magnetic member 312 may be a same magnet, that is, each second transmitting magnetic member 312 may share a same second transmitting magnetic member 312 and be located in a same magnetic field. Further, the orthographic projection of the second transmitting coil 311 on the substrate 101 may be located within the orthographic projection of the second transmitting magnetic member 312 on the substrate 101.

When an alternating electric signal is input to the second transmitting coil 311, the second transmitting coil 311 may generate vibration under the action of a magnetic field, and the vibration of the second transmitting coil 311 may generate ultrasonic waves by controlling the frequency of the alternating electric signal.

The second receiving unit 32 includes a second receiving coil 321 and a second receiving magnetic member 322, in which:

the second receiving coil 321 and the second receiving magnetic member 322 may be distributed in a direction perpendicular to the display substrate 1. For example, the second receiving coil 321 is disposed on a side of the substrate 101 close to the light emitting device layer 12, and the second receiving magnetic member 322 may be attached or otherwise disposed on a side of the substrate 101 away from the light emitting device layer 12.

The second receiving coil 321 may have the same structure as the first receiving coil 211, and may also include a plurality of layers of coil bodies 200 connected in series, each coil body 200 has a ring structure with a gap, and the coil bodies 200 of the same first receiving coil 221 may be distributed in the row direction.

The coil bodies 200 of the second receiving coil 321 may be disposed on the plurality of slopes 13 in a one-to-one correspondence, and the slopes 13 supporting the coil bodies 200 of the second receiving coil 321 may be disposed on the same layer as the slopes 13 supporting the second receiving coil 321, such as on the flat layer 106 or the dielectric layer 105. The second receiving coil 321 may be disposed in the same layer as the first emitting coil 211, and the detailed arrangement of the second receiving coil 321 and the slope 13 may refer to the first emitting coil 211, which is not described in detail herein. The orientation of the ramp 13 supporting the second transmitting coil 311 and the second receiving coil 321 may be the same or different.

The second receiving magnetic member 322 may be a permanent magnet or an electromagnet as long as it can generate a magnetic field, and the second receiving coil 321 is in the magnetic field of the second receiving magnetic member 322. For the sake of simple structure and easy installation, each first receiving magnetic member 222 may be the same magnet, that is, the second receiving coils 321 may share the same second receiving magnetic member 322 and be in the same magnetic field. Further, the orthographic projection of the second receiving coil 321 on the substrate 101 may be located within the orthographic projection of the second receiving magnetic element 322 on the substrate 101.

The ultrasonic wave reflected to the second receiving coil 321 can vibrate the second receiving coil 321, and under the action of the magnetic field, an induction signal can be generated, and the corresponding second receiving coil 321 can be determined through the induction signal, so that the position of the touch area in the column direction, that is, the position in the X direction can be determined.

Further, in order to avoid interference between the first touch device 2 and the second touch device 3, the frequencies of the ultrasonic signals generated by the first transmitting unit 21 and the second transmitting unit 31 may be different.

In some embodiments of the present disclosure, the number of the coil bodies 200 of the first transmission coil 211 and the first reception coil 221 may be made the same, which is the first number. The number of coil bodies 200 of the second transmitting coil 311 and the second receiving coil 321 is the same, which is the second number. The first number is different from the second number so that the first transmitting coil 211 and the second transmitting coil 311 can generate ultrasonic waves of different frequencies due to the different number of the coil bodies 200.

Of course, in other embodiments of the present disclosure, it is also possible to generate ultrasonic waves of different frequencies by making the frequencies of the alternating-current signals input to the first and second transmitting coils 211 and 311 different, without making the first number different from the second number.

As shown in fig. 7, the control unit 4 may be connected to the first touch device 2 and the second touch device 3, and configured to control the first transmitting unit 21 and the second transmitting unit 31 to transmit the ultrasonic waves, and determine the position of the touch area according to the ultrasonic waves received by the first receiving unit 22 and the second receiving unit 32. The position of the touch area includes positions of the touch area in a row direction, a column direction, and a direction perpendicular to the display substrate 1.

In some embodiments of the present disclosure, the control unit 4 may apply an alternating current signal to each first transmitting coil 211 to generate an ultrasonic wave, the ultrasonic wave may propagate to the first receiving coil 221 after being reflected by the finger of the user, so that the first receiving coil 221 in the magnetic field generates an induction signal, and the control unit 4 may receive the induction signal and determine the position of the touch area in the column direction according to which first receiving coil 221 the induction signal comes from. If a plurality of sensing signals are received at the same time, the position of the touch area in the column direction is determined according to the first receiving coil 221 corresponding to the sensing signal with the maximum signal intensity. Meanwhile, the control component 4 may apply an alternating current signal to the second transmitting coil 311, and determine the position of the touch area in the row direction according to the sensing signal of the second receiving coil 321, which is the same as the above-mentioned principle of determining the position in the column direction, and therefore, the detailed description thereof is omitted.

In addition, the control component 4 can also determine the position of the touch area in the direction perpendicular to the display substrate 1 according to the sensing signal of at least one of the first receiving coil 221 and the second receiving coil 321. For example, the control unit 4 may record the time when the first transmitting coil 211 transmits the ultrasonic wave and the time when the first receiving coil 221 generates the sensing signal, determine a time difference therebetween, and calculate a distance between the touch area and the display substrate 1 in a direction perpendicular to the display substrate 1 according to the time difference, the propagation speed of the ultrasonic wave, and the determined distance between the first transmitting coil 211 and the first receiving coil 221 during manufacturing, thereby determining the position of the touch area in the direction perpendicular to the display substrate 1.

The principle of determining the position of the touch area in the direction perpendicular to the display substrate 1 by the second transmitting coil 311 and the second receiving coil 321 is the same as the principle of determining the position of the touch area in the direction perpendicular to the display substrate 1 by the first transmitting coil 211 and the first receiving coil 221, and is not described in detail herein.

Of course, the position of the touch area in the direction perpendicular to the display substrate 1 may also be determined by the first touch device 2 and the second touch device 3, and if the determined positions are different, the middle position of the two positions in the direction perpendicular to the display substrate 1 is taken as the position of the touch area in the direction perpendicular to the display substrate 1.

The control component 4 may include a driving circuit board, on which a chip and a control circuit may be disposed, and the specific structure thereof is not particularly limited as long as the above-described functions are achieved.

Further, after determining the position of the touch area in the direction perpendicular to the display substrate 1, it may be further determined whether the position is within a preset range, that is, whether the distance between the touch area and the display substrate 1 is within the preset range, and if the position is within the preset range, the control component 4 may send a control signal to control the touch display panel to perform a corresponding action, such as displaying a specific picture. If the touch screen is not in the preset range, the control component 4 does not send out the control signal, and the touch display panel does not execute the corresponding action.

The embodiments of the present disclosure further provide a display device, including the touch display panel of any of the above embodiments, and the structure and the advantages of the touch display panel can refer to the above embodiments of the touch display panel, which are not described in detail herein. The display device can be an electronic device such as a mobile phone, a tablet personal computer and a television.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A touch display panel, comprising:

2. The touch display panel according to claim 1, wherein the first transmitting unit comprises a first transmitting magnetic member and a first transmitting coil distributed in a direction perpendicular to the display substrate; the first receiving unit comprises a first receiving magnetic piece and a first receiving coil which are distributed along the direction vertical to the display substrate;

3. The touch display panel according to claim 2, wherein the second transmitting unit includes a second transmitting magnetic member and a second transmitting coil distributed in a direction perpendicular to the display substrate; the second receiving unit comprises a second receiving magnetic piece and a second receiving coil which are distributed along the direction vertical to the display substrate;

4. The touch display panel according to claim 3, wherein the control component is configured to determine the position of the touch area in a direction perpendicular to the display substrate according to the sensing signal of at least one of the first receiving coil and the second receiving coil.

5. The touch display panel according to claim 3, wherein the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil each comprise a plurality of layers of serially connected coil bodies, and each coil body is a ring-shaped structure having a gap.

6. The touch display panel of claim 5, wherein the display substrate comprises:

7. The touch display panel of claim 5, wherein the display substrate comprises:

8. The touch display panel according to claim 3, wherein each of the first transmitting magnetic members is a same magnetic member; each first receiving magnetic piece is the same magnetic piece; each second transmitting magnetic part is the same magnetic part; each second receiving magnetic part is the same magnetic part.

9. The touch display panel according to claim 3, wherein the number of the coil bodies of the first transmitting coil and the first receiving coil is the same and is a first number;

the first number is different from the second number.

10. A display device comprising the touch display panel according to any one of claims 1 to 9.