CN105955552B

CN105955552B - Touch device, touch control method and curved-surface display device

Info

Publication number: CN105955552B
Application number: CN201610384188.3A
Authority: CN
Inventors: 张强; 张斌; 董殿正; 王光兴; 张衎
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2016-06-01
Filing date: 2016-06-01
Publication date: 2018-12-04
Anticipated expiration: 2036-06-01
Also published as: CN105955552A

Abstract

The present invention provides a kind of touch device, touch control method and curved-surface display device.Touch device includes the first touch control unit, the second touch control unit and processing unit；First touch control unit includes touch-control wave transmitting module and touch-control wave receiving module；Touch-control wave transmitting module emits touch-control wave；Whether processing unit is blocked according to the touch-control wave that touch-control wave receiving module receives judges on un-flexed direction with the presence or absence of touch event；Second touch control unit includes drive module, induction module and a plurality of touch-control driving/line of induction；Drive module sends touch drive signal to a plurality of touch-control driving/line of induction in touch-control driving time section；Touch-control sensing signal of the induction module on touch-control sensing period detection touch-control driving/line of induction；Processing unit changes according to touch-control sensing signal detection with the presence or absence of touch parameter, to judge on bending direction with the presence or absence of touch event.Present invention processing procedure in large scale curved-surface display is simple, yield is high and at low cost.

Description

Touch device, touch method and curved surface display device

Technical Field

The invention relates to the technical field of touch control of curved surface display panels, in particular to a touch control device, a touch control method and a curved surface display device.

Background

Currently, touch technologies such as resistive, capacitive (surface, projection), infrared, surface acoustic wave, electromagnetic, and optical are mainly available. The touch technology has different principles, different advantages and disadvantages and greatly different occupancy rates in different fields. However, for the curved surface touch field, the touch technology has many limitations in use. For example, it is difficult to realize curved touch in a large size field (more than 32 inches) by simply adopting an infrared touch technology; other touch technologies cannot improve inherent defects, and curved surface structures further cause problems of difficult manufacturing process, reduced yield, increased cost and the like, i.e., the prior art cannot have the advantages of simple manufacturing process, high yield and low cost when large-size curved surface display is performed.

Disclosure of Invention

The invention mainly aims to provide a touch device, a touch method and a curved surface display device, and solves the problems that the prior art cannot have the advantages of simple process, high yield and low cost when large-size curved surface display is carried out.

In order to achieve the above object, the present invention provides a touch device applied to a curved display panel, where the curved display panel includes a first side and a second side that are opposite to each other, and the first side and the second side are curved sides; the touch device comprises a first touch unit, a second touch unit and a processing unit;

the first touch unit comprises a touch wave transmitting module and a touch wave receiving module;

the touch wave transmitting module is used for transmitting touch waves; the touch wave receiving module is used for receiving the touch waves;

the touch waves comprise touch waves emitted from the first side edge to the second side edge, and/or the touch waves comprise touch waves emitted from the second side edge to the first side edge;

the processing unit is used for judging whether a touch event exists in the non-bending direction according to whether the touch wave received by the touch wave receiving module is shielded or not, and detecting a first touch coordinate in the non-bending direction when the touch event exists;

the second touch unit comprises a driving module, a sensing module and a plurality of touch driving/sensing lines arranged along the bending direction;

the driving module is used for sending touch driving signals to the touch driving/sensing lines in a touch driving time period;

the sensing module is used for detecting a touch sensing signal on the touch driving/sensing line in a touch sensing time period;

the processing unit is further configured to detect whether there is a touch parameter change according to the touch sensing signal, so as to determine whether there is a touch event in the bending direction, and detect a second touch coordinate in the bending direction when there is a touch event.

In implementation, the touch wave specifically includes an infrared ray or a surface acoustic wave;

the touch parameter includes a self-capacitance value or an impedance.

In implementation, the touch wave comprises infrared rays;

the touch wave transmitting module comprises a plurality of infrared transmitters arranged along the first side edge;

the touch wave receiving module comprises a plurality of infrared receivers arranged along the second side edge;

and the infrared transmitter scans the infrared receiver.

In implementation, the touch wave comprises infrared rays; the touch wave transmitting module comprises N infrared transmitters, and the touch wave receiving module comprises M infrared receivers; n and M are both positive integers, and N is less than M;

each infrared transmitter scans at least one infrared receiver in sequence;

when the infrared emitter is arranged on the first side edge, at least one infrared receiver scanned by the infrared emitter is arranged on the second side edge;

when the infrared emitter is arranged on the second side edge, at least one infrared receiver scanned by the infrared emitter is arranged on the first side edge.

In implementation, the touch wave comprises a surface acoustic wave; the touch wave transmitting module comprises a surface acoustic wave transmitter, and the touch wave receiving module comprises a surface acoustic wave receiver;

the surface acoustic wave transmitter is arranged at the right end or the left end of the first side, and the surface acoustic wave receiver is arranged at the right end or the left end of the second side;

the touch wave receiving module further comprises N first reflecting elements arranged along the first side edge and N second reflecting elements arranged along the second side edge; the first reflecting element corresponds to the second reflecting element; n is a positive integer;

the surface acoustic wave transmitter is used for transmitting surface acoustic waves to the N first reflecting elements respectively;

each first reflecting element is used for reflecting the surface acoustic wave to a corresponding second reflecting element;

the second reflecting element is used for reflecting the surface acoustic wave to the surface acoustic wave receiver.

In implementation, the curved display panel further includes a third side and a fourth side that are opposite and parallel to each other, and the third side and the fourth side are non-curved sides;

an included angle between the direction of the surface acoustic wave reflected by the first reflecting element and the second reflecting element corresponding to the first reflecting element and the third side edge is smaller than a preset angle.

In implementation, the touch device of the invention further comprises a limited protection structure;

the limited protection structure is used for protecting a limited area from being shielded; the restricted area includes a first restricted area and a second restricted area;

when the surface acoustic wave emitter is disposed at the right end portion of the first side, the first limited region includes a region surrounded by a connection surface of the surface acoustic wave emitter and the first reflecting element disposed at the leftmost end of the first side and the first side;

when the surface acoustic wave emitter is disposed at the left end of the first side, the first limited region includes a region surrounded by a connection surface of the surface acoustic wave emitter and a first reflecting element disposed at the rightmost end of the first side and the first side;

when the surface acoustic wave receiver is arranged at the right end part of the second side edge, the second limited area comprises an area formed by surrounding the surface acoustic wave receiver, a connecting surface of a second reflecting element arranged at the leftmost end of the second side edge and the second side edge;

when the surface acoustic wave receiver set up in when the left end portion of second side, the second restricted area include by the surface acoustic wave receiver with set up in the second reflecting element's of the rightmost end on second side connecting face with the region that the second side surrounds to form.

In implementation, the touch wave comprises a surface acoustic wave;

the touch wave transmitting module comprises a first surface acoustic wave transmitter and a second surface acoustic wave transmitter, and the touch wave receiving module comprises a first surface acoustic wave receiver and a second surface acoustic wave receiver;

when the first surface acoustic wave transmitter is arranged at the right end part of the first side edge, the first surface acoustic wave receiver is arranged at the right end part of the second side edge; when the first surface acoustic wave transmitter is arranged at the right end of the second side, the first surface acoustic wave receiver is arranged at the right end of the first side;

when the second surface acoustic wave transmitter is arranged at the left end of the first side, the second surface acoustic wave receiver is arranged at the left end of the second side; when the second surface acoustic wave transmitter is arranged at the left end of the second side, the second surface acoustic wave receiver is arranged at the left end of the first side;

the touch wave receiving module further comprises N first reflecting elements arranged on the right side of the first side edge, M second reflecting elements arranged on the left side of the first side edge, N third reflecting elements arranged on the right side of the second side edge, and M fourth reflecting elements arranged on the left side of the second side edge; n and M are both positive integers;

one of the first reflective elements corresponds to one of the third reflective elements, and one of the second reflective elements corresponds to one of the fourth reflective elements.

In practice, when the first surface acoustic wave transmitter is disposed at the right end of the first side and the second surface acoustic wave transmitter is disposed at the left end of the second side,

the first surface acoustic wave transmitter is used for transmitting surface acoustic waves to the N first reflecting elements respectively; each first reflection element is used for reflecting the surface acoustic wave to a corresponding third reflection element; the third reflecting element is used for reflecting the surface acoustic wave to the first surface acoustic wave receiver;

the second surface acoustic wave transmitter is configured to transmit surface acoustic waves to the M fourth reflective elements, respectively; each fourth reflecting element is used for reflecting the surface acoustic wave to the corresponding second reflecting element; the second reflecting element is used for reflecting the surface acoustic wave to the second surface acoustic wave receiver.

In practice, when the first surface acoustic wave emitter is disposed at the right end of the first side and the second surface acoustic wave emitter is disposed at the left end of the first side,

the second surface acoustic wave transmitters are used for respectively transmitting surface acoustic waves to the M second reflecting elements; each second reflection element is used for reflecting the surface acoustic wave to a corresponding fourth reflection element; the fourth reflecting element is used for reflecting the surface acoustic wave to the second surface acoustic wave receiver.

In practice, when the first surface acoustic wave transmitter is disposed at the right end of the second side and the second surface acoustic wave transmitter is disposed at the left end of the first side,

the first surface acoustic wave transmitter is configured to transmit surface acoustic waves to the N third reflective elements, respectively; each third reflecting element is used for reflecting the surface acoustic wave to the corresponding first reflecting element; the first reflecting element is used for reflecting the surface acoustic wave to the first surface acoustic wave receiver;

In practice, when the first surface acoustic wave radiator is disposed at the right end portion of the second side and the second surface acoustic wave radiator is disposed at the left end portion of the second side,

In practice, the second surface acoustic wave transmitter scans the second surface acoustic wave receiver while the first surface acoustic wave transmitter scans the first surface acoustic wave receiver; or,

after the first surface acoustic wave transmitter scans the first surface acoustic wave receiver, the second surface acoustic wave transmitter scans the second surface acoustic wave receiver; or,

after the second surface acoustic wave transmitter scans the second surface acoustic wave receiver, the first surface acoustic wave transmitter scans the first surface acoustic wave receiver.

the limited protection structure is used for protecting a limited area from being shielded; the restricted areas include a first restricted area, a second restricted area, a third restricted area, and a fourth restricted area;

when the first surface acoustic wave transmitter is arranged at the right end part of the first side edge, the second surface acoustic wave transmitter is arranged at the left end part of the second side edge, the first surface acoustic wave receiver is arranged at the right end part of the second side edge, the second surface acoustic wave receiver is arranged at the left end part of the first side edge, the first limited area comprises a region formed by the first surface acoustic wave transmitter and a connecting surface arranged at the leftmost first reflecting element of the first side edge and the first side edge enclosure, the second limited area comprises a region formed by the second surface acoustic wave receiver and a connecting surface arranged at the rightmost second reflecting element of the first side edge and the first side edge enclosure, and the third limited area comprises a region formed by the first surface acoustic wave receiver and a connecting surface arranged at the leftmost third reflecting element of the second side edge and the second side edge enclosure, the fourth restricted area includes an area formed by a connection surface of the second surface acoustic wave transmitter and a fourth reflection element disposed right most on the second side edge and the second side edge;

when the first surface acoustic wave transmitter is arranged at the right end part of the first side edge, the second surface acoustic wave transmitter is arranged at the left end part of the first side edge, the first surface acoustic wave receiver is arranged at the right end part of the second side edge, the second surface acoustic wave receiver is arranged at the left end part of the second side edge, the first limited area comprises a region formed by the first surface acoustic wave transmitter and a connecting surface arranged at the leftmost first reflecting element of the first side edge and the first side edge enclosure, the second limited area comprises a region formed by the second surface acoustic wave transmitter and a connecting surface arranged at the rightmost second reflecting element of the first side edge and the first side edge enclosure, and the third limited area comprises a region formed by the first surface acoustic wave receiver and a connecting surface arranged at the leftmost third reflecting element of the second side edge and the second side edge enclosure, the fourth restricted area includes an area made up of a connection surface of the second surface acoustic wave receiver and a fourth reflection element disposed right most on the second side and the second side;

when the first surface acoustic wave transmitter is arranged at the right end part of the second side edge, the second surface acoustic wave transmitter is arranged at the left end part of the first side edge, the first surface acoustic wave receiver is arranged at the right end part of the first side edge, the second surface acoustic wave receiver is arranged at the left end part of the second side edge, the first limited area comprises a region formed by the first surface acoustic wave receiver and a connecting surface arranged at the leftmost first reflecting element of the first side edge and the first side edge enclosure, the second limited area comprises a region formed by the second surface acoustic wave transmitter and a connecting surface arranged at the rightmost second reflecting element of the first side edge and the first side edge enclosure, and the third limited area comprises a region formed by the first surface acoustic wave transmitter and a connecting surface arranged at the leftmost third reflecting element of the second side edge and the second side edge enclosure, the fourth restricted area includes an area made up of a connection surface of the second surface acoustic wave receiver and a fourth reflection element disposed right most on the second side and the second side;

when the first surface acoustic wave transmitter is arranged at the right end part of the second side edge, the second surface acoustic wave transmitter is arranged at the left end part of the second side edge, the first surface acoustic wave receiver is arranged at the right end part of the first side edge, the second surface acoustic wave receiver is arranged at the left end part of the first side edge, the first limited area comprises a region formed by the first surface acoustic wave receiver and a connecting surface arranged at the leftmost first reflecting element of the first side edge and the first side edge enclosure, the second limited area comprises a region formed by the second surface acoustic wave receiver and a connecting surface arranged at the rightmost second reflecting element of the first side edge and the first side edge enclosure, and the third limited area comprises a region formed by the first surface acoustic wave transmitter and a connecting surface arranged at the leftmost third reflecting element of the second side edge and the second side edge enclosure, the fourth limited region includes a region composed of the second surface acoustic wave transmitter, a connection surface of a fourth reflection element disposed rightmost on the second side, and the second side.

In implementation, the processing unit comprises a first processing module and a second processing module;

the first processing module is used for judging whether a touch event exists in the non-bending direction according to whether the touch wave received by the touch wave receiving module is shielded or not, detecting a first touch coordinate in the non-bending direction when the touch event exists, and sending a processing control signal to the second processing module;

the second processing module is used for detecting a second touch coordinate in the bending direction according to the touch sensing signal when receiving the processing control signal.

the first processing module is used for detecting whether touch parameter change exists according to the touch sensing signal so as to judge whether a touch event exists in the bending direction, detecting a second touch coordinate in the bending direction when the touch event exists, and sending a processing control signal to the second processing module;

the second processing module is used for detecting a first touch coordinate in a non-bending direction according to the position of the shielded position of the touch wave received by the touch wave receiving module when the processing control signal is received.

The invention also provides a touch method applied to the touch device, and the touch method comprises the following steps:

a driving induction step: the touch wave transmitting module transmits a touch wave; the touch wave receiving module receives the touch wave; the driving module sends a touch driving signal to the touch driving/sensing lines in a touch driving time period; the sensing module detects a touch sensing signal on the touch driving/sensing line in a touch sensing time period;

a detection step: the processing unit judges whether a touch event exists in the non-bending direction according to whether the touch wave received by the touch wave receiving module is shielded or not, and detects a first touch coordinate in the non-bending direction when the touch event exists; the processing unit detects whether touch parameter changes exist according to the touch sensing signal so as to judge whether a touch event exists in the bending direction, and detects a second touch coordinate in the bending direction when the touch event exists.

the detecting step specifically comprises:

the first processing module judges whether a touch event exists in the non-bending direction according to whether the touch wave received by the touch wave receiving module is shielded, detects a first touch coordinate in the non-bending direction when the touch event exists, and sends a processing control signal to the second processing module;

when the second processing module receives the processing control signal, the second processing module detects a second touch coordinate in the bending direction according to the touch sensing signal.

the detecting step specifically comprises:

the first processing module detects whether touch parameter change exists according to the touch sensing signal so as to judge whether a touch event exists in the bending direction, detects a second touch coordinate in the bending direction when the touch event exists, and sends a processing control signal to the second processing module;

when the second processing module receives the processing control signal, the second processing module detects a first touch coordinate in a non-bending direction according to the position of the shielded position of the touch wave received by the touch wave receiving module.

The invention also provides a curved surface display device which comprises a curved surface display panel and the touch device.

Compared with the prior art, the touch device, the touch method and the curved surface display device adopt the touch mode of transmitting and receiving touch waves in the non-bending direction and adopt the touch mode of driving/sensing lines in the bending direction, so that large-size curved surface display can be realized, the number of layers of touch electrodes can be reduced, and the process is simplified.

Drawings

Fig. 1 is a block diagram of a touch device according to an embodiment of the invention;

FIG. 2 is a diagram of a touch device according to a first embodiment of the present invention;

FIG. 3 is a diagram of a second embodiment of a touch device according to the present invention;

FIG. 4 is a diagram of a touch device according to a third embodiment of the present invention;

FIG. 5 is a diagram of a touch device according to a third embodiment of the present invention;

fig. 6 is a circuit block diagram of the touch device according to the first embodiment and the second embodiment of the present invention;

fig. 7 is a circuit block diagram of a third embodiment and a fourth embodiment of a touch device according to the present invention;

fig. 8 is a block diagram of a touch device according to another embodiment of the invention;

fig. 9 is a block diagram of a touch device according to another embodiment of the invention;

FIG. 10 is a flowchart illustrating operations of a first embodiment and a second embodiment of a touch device according to the present invention;

fig. 11 is a flowchart illustrating the operation of the touch device according to the third and fourth embodiments of the present invention;

fig. 12 is a flowchart of a touch method according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The touch device provided by the embodiment of the invention is applied to a curved surface display panel, wherein the curved surface display panel comprises a first side edge and a second side edge which are oppositely arranged, and the first side edge and the second side edge are bent side edges;

as shown in fig. 1, the touch device includes a first touch unit 11, a second touch unit 12, and a processing unit 13;

the first touch unit 11 includes a touch wave transmitting module 111 disposed on the first side and a touch wave receiving module 112 disposed on the second side;

the touch wave transmitting module 111 is configured to transmit a touch wave;

the touch wave receiving module 112 is configured to receive the touch wave;

the processing unit 13 is connected to the touch wave receiving module 112;

the processing unit 13 is configured to determine whether a touch event exists in the non-bending direction according to whether the touch wave received by the touch wave receiving module 112 is blocked, and detect a first touch coordinate in the non-bending direction when the touch event exists;

the second touch unit 12 includes a driving module 121, a sensing module 122, and a plurality of touch driving/sensing lines (not shown in fig. 1) disposed along a bending direction;

the driving module 121 is configured to send a touch driving signal to the touch driving/sensing lines in a touch driving time period;

the sensing module 122 is configured to detect a touch sensing signal on the touch driving/sensing line in a touch sensing time period;

the processing unit 13 is also connected with the sensing module 122;

the processing unit 13 is further configured to detect whether there is a touch parameter change according to the touch sensing signal, so as to determine whether there is a touch event in the bending direction, and detect a second touch coordinate in the bending direction when there is the touch event.

The touch device provided by the embodiment of the invention adopts a touch mode of touch wave emission and touch wave reception in the non-bending direction and a touch mode of touch driving/induction lines in the bending direction, so that large-size curved surface display can be realized, the number of layers of touch electrodes can be reduced, and the process is simplified.

In practical operation, the touch device according to the embodiment of the present invention may preferably adopt a touch method of infrared emission and infrared reception in the non-bending direction, and may also adopt other touch methods such as surface acoustic wave touch. The touch device provided by the embodiment of the invention adopts the touch mode of touch wave emission and touch wave reception in the non-bending direction, so that the touch device can realize touch control and simplify the process. The above touch manner in the non-bending direction is only for illustration and not for limitation.

In practical applications, since the projected capacitive self-contained touch technology and the resistive touch technology only need to set the touch driving/sensing lines in one direction (i.e., in the bending direction), the touch device according to the embodiment of the invention preferably uses the projected capacitive self-contained touch method and the resistive touch method in the bending direction, and the above preferred touch method in the bending direction is only used as an example and is not limited.

Specifically, the touch wave may include an infrared ray or a surface acoustic wave;

the touch parameter includes a self-capacitance value or an impedance.

When the touch waves comprise infrared rays, the touch device of the embodiment of the invention adopts an infrared touch technology in a non-bending direction;

when the touch waves comprise surface acoustic waves, the touch device disclosed by the embodiment of the invention adopts a surface acoustic wave touch technology in a non-bending direction;

when the touch parameter includes a self-capacitance value, the touch device of the embodiment of the invention adopts a projected capacitive self-capacitance touch technology in a bending direction;

when the touch parameter includes impedance, the touch device according to the embodiment of the invention adopts a resistive touch technology in a bending direction.

In practical operation, when the touch wave includes infrared rays, the touch wave transmitting module may include a plurality of infrared ray transmitters disposed along the first side;

and scanning the touch wave receiver by the touch wave transmitter.

That is, in a specific embodiment, the infrared emitters and the infrared receivers are arranged in a side-by-side manner, and the infrared emitters and the infrared receivers are in one-to-one correspondence; the processing unit 13 determines whether a touch event exists in the non-bending direction by determining whether the infrared ray received by the infrared receiver is blocked, and determines a touch coordinate in the non-bending direction according to the infrared ray received by the infrared receiver;

the number of the infrared emitters and the number of the infrared receivers depend on the requirement of the touch resolution of the curved surface display panel.

As shown in fig. 2, the curved display panel 20 to which the first embodiment of the touch device of the invention is applied includes an upper side 201 and a lower side 202 that are oppositely disposed, and as can be seen from fig. 2, the upper side 201 and the second side 202 are curved sides;

a unidirectional infrared touch structure is adopted in the non-bending direction of the curved display panel 20 (i.e., the infrared path shown by the dotted line in fig. 2), and the implementation manner is that a plurality of infrared transmitters are sequentially arranged at the upper end of the frame of the curved display panel 20 from left to right along the upper side 201, and a plurality of infrared receivers are sequentially arranged at the lower end of the frame of the curved display panel 20 from left to right along the lower side 202;

the density of the infrared emitters and the infrared receivers depends on the requirement of the touch resolution of the curved display panel;

as shown in fig. 2, the touch wave transmitting module includes a first infrared emitter 211, a second infrared emitter 212, a third infrared emitter 213, a fourth infrared emitter 214, a fifth infrared emitter 215, a sixth infrared emitter 216, a seventh infrared emitter 217, and an eighth infrared emitter 218, which are sequentially disposed from left to right along the upper side 201;

the touch wave receiving module includes a first infrared receiver 221, a second infrared receiver 222, a third infrared receiver 223, a fourth infrared receiver 224, a fifth infrared receiver 225, a sixth infrared receiver 226, a seventh infrared receiver 227, and an eighth infrared receiver 228 sequentially disposed along the lower side 202;

the first infrared transmitter 211 transmits infrared light to the first infrared receiver 221, and determines whether a touch event exists by determining whether the infrared light received by the first infrared receiver 221 is blocked, and so on, that is, one infrared transmitter corresponds to one infrared receiver;

on the curved display panel 20, a plurality of touch scanning/sensing lines are further disposed from top to bottom along the bending direction, and in the first embodiment of the touch device of the present invention, a projected capacitive self-contained touch manner is adopted in the bending direction;

as shown in fig. 2, a first touch scan/sense line 231, a second touch scan/sense line 232, a third touch scan/sense line 233, a fourth touch scan/sense line 234, a fifth touch scan/sense line 235, a sixth touch scan/sense line 236 and a seventh touch scan/sense line 237 are sequentially disposed on the curved display panel 20 from top to bottom;

the first embodiment of the touch device of the invention only needs to set one touch electrode layer (the touch electrode layer only needs to set a plurality of touch scanning/sensing lines along the bending direction), and adopts the infrared touch technology (without setting the touch electrode) in the non-bending direction which is relatively easy to realize touch, thereby realizing large-size curved surface display, simple process and low cost.

The first embodiment of the touch device of the present invention adopts a projected capacitive self-contained touch structure In the curved surface bending direction, and the implementation manner of the projected capacitive self-contained touch structure can be Add-On (In-cell), In-cell (In-cell) or On-cell (out-cell).

Specifically, according to another specific embodiment, when the touch wave specifically includes infrared rays, the touch wave transmitting module may include N infrared transmitters, and the touch wave receiving module may include M infrared receivers; n and M are both positive integers, and N is less than M;

each infrared transmitter scans at least one infrared receiver in sequence;

the N infrared transmitters are respectively arranged on the first side edge and the second side edge, and the M infrared receivers are respectively arranged on the first side edge and the second side edge;

that is, infrared emitter and infrared receiver adopt the mode that the contralateral mixes was arranged to adopt the form that an infrared emitter scans a plurality of infrared receiver in proper order, its advantage is reduced infrared emitter's number, but infrared emitter needs a plurality of scanning positions of preset and promote touch-control scanning frequency, and this kind of scanning mode can only adopt the mode of placing in opposite directions on infrared emitter and infrared receiver's the mode of arranging (if placing in the same direction, infrared emitter is few and infrared receiver is many, then at the screen on this side that is close to infrared emitter, must have "blind area" to appear).

As shown in fig. 3, the second embodiment of the touch device of the present invention is applied to a curved display panel 30;

the curved display panel 30 comprises an upper side 301 and a lower side 302;

the second embodiment of the touch device of the present invention employs the same touch manner in the bending direction as the first embodiment of the touch device of the present invention;

different from the first embodiment of the touch device of the present invention, the second embodiment of the touch device of the present invention includes a plurality of infrared emitters disposed opposite to each other, and a plurality of infrared receivers disposed opposite to each other, and the number of the infrared emitters is smaller than the number of the infrared receivers;

the touch wave emitting module in the second embodiment of the touch device according to the present invention includes a first infrared emitter 311, a second infrared emitter 312, a third infrared emitter 313, a fourth infrared emitter 314, a fifth infrared emitter 315, a sixth infrared emitter 316, and a seventh infrared emitter 317;

the touch wave receiving module in the second embodiment of the touch device of the invention includes a first infrared receiver 321, a second infrared receiver 322, a third infrared receiver 323, a fourth infrared receiver 324, a fifth infrared receiver 325, a sixth infrared receiver 326, a seventh infrared receiver 327, an eighth infrared receiver 328, a ninth infrared receiver 329, a tenth infrared receiver 3210, an eleventh infrared receiver 3211, a twelfth infrared receiver 3212, a thirteenth infrared receiver 3213, a fourteenth infrared receiver 3214, a fifteenth infrared receiver 3215, a sixteenth infrared receiver 3216, a seventeenth infrared receiver 3217, an eighteenth infrared receiver 3218, and a nineteenth infrared receiver 3219;

the first infrared emitter 311, the third infrared emitter 313, the fifth infrared emitter 315 and the seventh infrared emitter 317 are disposed on the lower side 302;

the second infrared emitter 312, the fourth infrared emitter 314, and the sixth infrared emitter 316 are disposed on the upper side 301;

a first infrared receiver 321, a second infrared receiver 322, a sixth infrared receiver 326, a seventh infrared receiver 327, an eighth infrared receiver 328, a twelfth infrared receiver 3212, a thirteenth infrared receiver 3213, a fourteenth infrared receiver 3214, an eighteenth infrared receiver 3218, and a nineteenth infrared receiver 3219 are disposed on the upper side 301;

a third infrared ray receiver 323, a fourth infrared ray receiver 324, a fifth infrared ray receiver 325, a ninth infrared ray receiver 329, a tenth infrared ray receiver 3210, an eleventh infrared ray receiver 3211, a fifteenth infrared ray receiver 3215, a sixteenth infrared ray receiver 3216, and a seventeenth infrared ray receiver 3217 are disposed on the lower side 302;

the first infrared transmitter 311 scans the first infrared receiver 321 and the second infrared receiver 322 in sequence; the second infrared transmitter 312 sequentially scans the third infrared receiver 323, the fourth infrared receiver 324, and the fifth infrared receiver 325; the third infrared transmitter 313 scans the sixth infrared receiver 326, the seventh infrared receiver 327, and the eighth infrared receiver 328 in sequence; the fourth infrared transmitter 314 sequentially scans the ninth infrared receiver 329, the tenth infrared receiver 3210, and the eleventh infrared receiver 3211; the fifth infrared transmitter 315 sequentially scans a twelfth infrared receiver 3212, a thirteenth infrared receiver 3213, and a fourteenth infrared receiver 3214; the sixth infrared transmitter 316 sequentially scans a fifteenth infrared receiver 3215, a sixteenth infrared receiver 3216, and a seventeenth infrared receiver 3217; the seventh infrared emitter 317 sequentially scans the eighteenth infrared receiver 3218 and the nineteenth infrared receiver 3219;

the dotted lines in FIG. 3 also show the path of the sequentially scanned infrared rays;

a plurality of touch scanning/sensing lines are further disposed on the curved display panel 30 from top to bottom along the bending direction, and in the second embodiment of the touch device of the present invention, a projected capacitive self-contained touch manner is also employed in the bending direction;

as shown in fig. 3, a first touch scan/sense line 331, a second touch scan/sense line 332, a third touch scan/sense line 333, a fourth touch scan/sense line 334, a fifth touch scan/sense line 335, a sixth touch scan/sense line 336 and a seventh touch scan/sense line 337 are sequentially disposed on the curved display panel 30 from top to bottom.

The first embodiment and the second embodiment of the touch device described in the present invention are hybrid touch devices, and the infrared and other touch technologies (such as projected capacitive self-contained touch) are applied to a curved display panel, so that the complexity of the touch structure can be effectively reduced, the yield can be increased, and the cost can be reduced on the premise of successfully implementing the touch function.

In the first embodiment and the second embodiment of the touch device, in terms of the touch implementation manner, the infrared touch structure is used in the non-curved surface bending direction, and the other touch structure (such as a projected capacitive touch structure) is used in the curved surface bending direction; touch events are respectively collected, and a processor for touch processing processes the events, so that a touch function is realized.

According to another specific embodiment, the touch wave may also be a surface acoustic wave, that is, a surface acoustic wave touch technology may be used in the non-bending direction to identify whether a touch event exists in the non-bending direction.

In an embodiment of the touch device of the invention, the touch wave transmitting module may only include a surface acoustic wave transmitter, and the touch wave receiving module may only include a surface acoustic wave receiver;

That is, in the embodiment of the touch device according to the invention, the surface acoustic wave transmitter and the surface acoustic wave receiver are disposed opposite to each other, and the surface acoustic wave transmitter and the surface acoustic wave receiver may be both disposed at the left end portion, and the surface acoustic wave transmitter and the surface acoustic wave receiver may be both disposed at the right end portion, or the surface acoustic wave transmitter and the surface acoustic wave receiver may be disposed diagonally, that is, the surface acoustic wave transmitter may be disposed at the left end portion and the surface acoustic wave receiver may be disposed at the right end portion, and the surface acoustic wave transmitter may be disposed at the right end portion and the surface acoustic wave receiver may be disposed at the left end portion, and the embodiment of the touch device according to the invention needs to add N first reflective elements disposed along the first side edge and N second reflective elements disposed along the second side edge to the touch wave receiving module, the surface acoustic wave receiver can receive the surface acoustic wave transmitted by the surface acoustic wave transmitter under the condition that the curved surface display panel is not touched by controlling the direction of the surface acoustic wave transmitted by the surface acoustic wave transmitter, the reflection direction of the first reflection element and the reflection direction of the second reflection element, and when the curved surface display panel is touched, the touch event can be judged according to whether the surface acoustic wave received by the surface acoustic wave receiver is shielded, and the touch position in the non-bending direction can be detected.

Specifically, the curved display panel further includes a third side and a fourth side that are disposed opposite to each other and parallel to each other, and the third side and the fourth side are non-curved sides;

the angle between the direction of the surface acoustic wave reflected by the first reflective element and the corresponding second reflective element and the third side is smaller than a predetermined angle, i.e. the path of the surface acoustic wave is preferably perpendicular to the curved side and parallel to the non-curved side, so as to obtain the touch position.

The embodiment of the touch device of the present invention has the following problems in practical applications: restricted areas (Restricted areas) exist because: the surface acoustic wave emitted by the surface acoustic wave emitter cannot be transmitted along an actual arc line, a limited area exists in an area within a top end connecting line of the arc line, if an obstacle appears in the area in the scanning process, the touch event in the surface acoustic wave direction is easily identified by mistake, and similarly, the surface acoustic wave receiver end also has the limited arc surface area.

In order to solve the above problem, the touch device according to the embodiment of the present invention further includes a limited protection structure;

when the surface acoustic wave receiver is arranged at the left end of the second side edge, the second limited area comprises an area formed by surrounding the surface acoustic wave receiver, a connecting surface of a second reflecting element arranged at the rightmost end of the second side edge and the second side edge;

that is, if the limited area is blocked, the path of the surface acoustic wave may be blocked, so as to affect the touch effect, and in order to prevent the above situation, it is necessary for the touch device according to the embodiment of the present invention to provide a limited protection structure similar to a frame in the limited area.

As shown in fig. 4, the third embodiment of the touch device of the present invention is applied to a curved display panel;

the curved display panel comprises a lower side 401 and an upper side 402;

the touch control method adopted by the third embodiment of the touch control device in the non-bending direction is a surface acoustic wave touch control method;

the third embodiment of the touch device of the present invention employs the same touch manner in the bending direction as the first and second embodiments of the touch device of the present invention;

a third embodiment of the touch device of the present invention includes a first touch unit; the first touch unit comprises a touch wave transmitting module and a touch wave receiving module;

the touch wave transmitting module comprises a surface acoustic wave transmitter 41, and the touch wave receiving module comprises a surface acoustic wave receiver 42;

the surface acoustic wave transmitter 41 is disposed at the right end of the lower side 401, and the surface acoustic wave receiver 42 is disposed at the right end of the upper side 402;

the touch wave receiving module further comprises N first reflective elements 431 arranged along the lower side 401 and N second reflective elements 432 arranged along the upper side 402; a first reflective element 431 corresponds to a second reflective element 432; n is a positive integer;

the surface acoustic wave transmitter 41 is configured to transmit a surface acoustic wave to the N first reflecting elements 431, respectively;

each first reflective element 431 is used for reflecting the surface acoustic wave to a corresponding second reflective element 432;

the second reflecting element 432 is used for reflecting the surface acoustic wave to the surface acoustic wave receiver 42;

in fig. 4, the dashed line shows the surface acoustic wave path from the lower side 401 to the upper side 402;

it is worth noting that, since the number of the first reflective elements 431 on the lower side 401 and the number of the second reflective elements 432 on the upper side 402 are larger in fig. 4, the first reflective element 431 and the second reflective element 432 are therefore not labeled one for one, but is only labeled alternatively, but in practice, the vertical lines from left to right on the lower side 401 all indicate the first reflective elements, the vertical lines from left to right on the upper side 402 all indicate the second reflective elements, and the surface acoustic wave paths shown by the dashed lines in fig. 4 are not all the surface acoustic wave paths directed from the lower side 401 to the upper side 402, and in fact there are two columns of surface acoustic wave paths not shown between every two columns of surface acoustic wave paths shown by the dashed lines in fig. 4 (i.e., the surface acoustic wave paths directed by the first reflective element to the second reflective element corresponding thereto);

as shown in fig. 4, a first touch scan/sense line 441, a second touch scan/sense line 442, a third touch scan/sense line 443, a fourth touch scan/sense line 444, a fifth touch scan/sense line 445, a sixth touch scan/sense line 446, a seventh touch scan/sense line 337, and an eighth touch scan/sense line 448 are sequentially disposed on the curved display panel from top to bottom.

Further, as shown in fig. 4, the third embodiment of the touch device according to the present invention has a limited region in operation, the limited region includes a lower first limited region and an upper second limited region, since the surface acoustic wave emitted from the surface acoustic wave reflector 41 cannot propagate along the arc surface of the curved lower side 401, there is a first limited region formed by the connection surface of the surface acoustic wave reflector 41 and the leftmost first reflective element 431 and the lower side 401, and the surface acoustic wave emitted from the second reflective element 432 to the surface acoustic wave receiver 42 cannot propagate along the arc surface of the curved upper side 402, so that there is a second limited region formed by the connection surface of the surface acoustic wave receiver 42 and the leftmost second reflective element 432 and the upper side 402, when there is an obstacle in the first limited region and/or the second limited region, to improve the problem that the touch time in the non-bending direction is easily recognized by mistake, the third embodiment of the touch device of the invention may include a limited protection structure (not shown in fig. 4) for protecting the first limited area and the second limited area from being blocked.

In order to improve the problem that the area of the first limited region is larger than that of the second limited region in fig. 4, the area of the limited region can be effectively reduced by adopting a design mode of two pairs of surface acoustic wave transmitting-receiving devices, the same pair of surface acoustic wave transmitting-receiving devices do not have requirements on the upper and lower sides and only need to be on the same side (left/right), and a specific implementation mode of the method is described below.

In an embodiment of the touch device of the present invention, the touch wave includes a surface acoustic wave;

the touch wave transmitting module comprises a first surface acoustic wave transmitter and a second surface acoustic wave transmitter, and the touch wave receiving module comprises a first surface acoustic wave receiver and a second surface acoustic wave receiver; the first surface acoustic wave transmitter corresponds to the first surface acoustic wave receiver, and the second surface acoustic wave transmitter corresponds to the second surface acoustic wave receiver;

the touch wave receiving module further comprises N first reflecting elements arranged on the right side of the first side edge from right to left, M second reflecting elements arranged on the left side of the first side edge from left to right, N third reflecting elements arranged on the right side of the second side edge from right to left, and M fourth reflecting elements arranged on the left side of the second side edge from left to right; n and M are both positive integers; the values of N and M depend on the touch precision in the non-bending direction;

Specifically, in the embodiment of the touch device of the invention, when the first surface acoustic wave emitter is disposed at the right end of the first side and the second surface acoustic wave emitter is disposed at the left end of the second side,

the first surface acoustic wave transmitter is used for transmitting surface acoustic waves to the N first reflecting elements respectively; each first reflection element is used for reflecting the surface acoustic wave to a corresponding third reflection element; the third reflecting element is configured to reflect the surface acoustic wave to the first surface acoustic wave receiver, that is, the first surface acoustic wave transmitter and the first surface acoustic wave receiver at the right end are responsible for detecting a touch event in a non-bending direction on the right side of the curved display panel, and the surface acoustic wave transmitted by the first surface acoustic wave transmitter at the right end of the first side edge sequentially passes through the first reflecting element and the corresponding third reflecting element and then is emitted to the first surface acoustic wave receiver at the right end of the second side edge;

the second surface acoustic wave transmitter is configured to transmit surface acoustic waves to the M fourth reflective elements, respectively; each fourth reflecting element is used for reflecting the surface acoustic wave to the corresponding second reflecting element; the second reflection element is configured to reflect the surface acoustic wave to the second surface acoustic wave receiver, that is, the second surface acoustic wave transmitter and the second surface acoustic wave receiver at the left end portion are responsible for detecting a touch event in a non-bending direction on the left side of the curved display panel, and the surface acoustic wave transmitted by the second surface acoustic wave transmitter at the left end portion of the second side edge sequentially passes through the fourth reflection element and the corresponding second reflection element and then is emitted to the second surface acoustic wave receiver at the left end portion of the first side edge.

Specifically, in the embodiment of the touch device of the invention, when the first surface acoustic wave emitter is disposed at the right end of the first side and the second surface acoustic wave emitter is disposed at the left end of the first side,

the first surface acoustic wave transmitter is used for transmitting surface acoustic waves to the N first reflecting elements respectively; each first reflection element is used for reflecting the surface acoustic wave to a corresponding third reflection element; the third reflecting element is configured to reflect the surface acoustic wave to the first surface acoustic wave receiver, that is, the first surface acoustic wave transmitter and the first surface acoustic wave receiver at the right end are responsible for detecting a touch event in a non-bending direction on the right side of the curved display panel, and the surface acoustic wave transmitted by the first surface acoustic wave transmitter at the right end on the first side sequentially passes through the first reflecting element and the corresponding third reflecting element and is emitted to the first surface acoustic wave receiver at the right end on the second side;

the second surface acoustic wave transmitters are used for respectively transmitting surface acoustic waves to the M second reflecting elements; each second reflection element is used for reflecting the surface acoustic wave to a corresponding fourth reflection element; the fourth reflecting element is configured to reflect the surface acoustic wave to the second surface acoustic wave receiver, that is, the second surface acoustic wave transmitter and the second surface acoustic wave receiver at the left end are responsible for detecting a touch event in a non-bending direction on the left side of the curved display panel, and the surface acoustic wave transmitted by the second surface acoustic wave transmitter at the left end of the first side sequentially passes through the second reflecting element and the corresponding fourth reflecting element and then is emitted to the second surface acoustic wave receiver at the left end of the second side.

Specifically, in the embodiment of the touch device of the invention, when the first surface acoustic wave emitter is disposed at the right end of the second side and the second surface acoustic wave emitter is disposed at the left end of the first side,

the first surface acoustic wave transmitter is configured to transmit surface acoustic waves to the N third reflective elements, respectively; each third reflecting element is used for reflecting the surface acoustic wave to the corresponding first reflecting element; the first reflection element is used for reflecting the surface acoustic wave to the first surface acoustic wave receiver, namely the first surface acoustic wave emitter and the first surface acoustic wave receiver which are positioned at the right end part are responsible for detecting a touch event in the non-bending direction of the right side of the curved surface display panel, and the surface acoustic wave emitted by the first surface acoustic wave emitter positioned at the right end part of the second side edge sequentially passes through the third reflection element and the corresponding first reflection element and is emitted to the first surface acoustic wave receiver positioned at the right end part of the first side edge;

Specifically, in the embodiment of the touch device of the invention, when the first surface acoustic wave emitter and the second surface acoustic wave emitter are both disposed on the second side,

the first surface acoustic wave transmitter is configured to transmit surface acoustic waves to the N third reflective elements, respectively; each third reflecting element is used for reflecting the surface acoustic wave to the corresponding first reflecting element; the first reflection element is used for reflecting the surface acoustic wave to the first surface acoustic wave receiver, namely the first surface acoustic wave emitter and the first surface acoustic wave receiver which are positioned at the right end part are responsible for detecting a touch event in the non-bending direction of the right side of the curved surface display panel, and the surface acoustic wave emitted by the first surface acoustic wave emitter positioned at the right end part of the first side edge sequentially passes through the first reflection element and the corresponding third reflection element to be emitted to the first surface acoustic wave receiver positioned at the right end part of the second side edge;

Specifically, while the first surface acoustic wave transmitter scans the first surface acoustic wave receiver, the second surface acoustic wave transmitter scans the second surface acoustic wave receiver; or,

after the second surface acoustic wave transmitter scans the second surface acoustic wave receiver, the first surface acoustic wave transmitter scans the first surface acoustic wave receiver;

that is, in the touch workflow, two sets of surface acoustic wave transmitters-receivers can scan synchronously or sequentially.

In comparison with the above-mentioned embodiment of the touch device using only one set of saw transmitter-receiver, the area of the restricted area in the embodiment of the touch device using two sets of saw transmitter-receiver is reduced, and the restricted area in the embodiment of the touch device using two sets of saw transmitter-receiver is changed into two first and second restricted areas with much smaller area on the first side and two third and fourth restricted areas with much smaller area on the second side, and the specific restricted areas include which ranges are described below.

Preferably, the specific embodiment of the touch device of the present invention further includes a limited protection structure;

The touch device of the present invention using two sets of surface acoustic wave transmitter-receivers is described below with an embodiment.

As shown in fig. 5, the fourth embodiment of the touch device of the present invention is applied to a curved display panel;

the curved display panel comprises a lower side 501 and an upper side 502;

the touch control method adopted by the fourth embodiment of the touch control device in the non-bending direction is a surface acoustic wave touch control method;

the fourth embodiment of the touch device of the present invention employs the same touch manner in the bending direction as the first and second embodiments of the touch device of the present invention;

the touch wave transmitting module comprises a first surface acoustic wave transmitter 511 and a second surface acoustic wave transmitter 512, and the touch wave receiving module comprises a first surface acoustic wave receiver 521 and a second surface acoustic wave receiver 522;

the first surface acoustic wave transmitter 511 is disposed at the right end of the lower side 501, and the first surface acoustic wave receiver 521 is disposed at the right end of the upper side 502;

the second surface acoustic wave transmitter 512 is disposed at the left end of the lower side 501, and the second surface acoustic wave receiver 522 is disposed at the left end of the upper side 502;

the touch wave receiving module further includes N first reflective elements 531 disposed on the right side of the lower side 501, M second reflective elements 532 disposed on the left side of the lower side 501, N third reflective elements 533 disposed on the right side of the upper side 502, and M fourth reflective elements 534 disposed on the left side of the upper side 502; n and M are both positive integers;

a first reflective element 531 and a third reflective element 533 are corresponding, and as can be seen from fig. 5, the first reflective element 531 and the third reflective element 533 which are opposite to each other in the vertical direction are corresponding;

one of the second reflective elements 532 corresponds to one of the fourth reflective elements 534, and as can be seen from fig. 5, the second reflective element 532 and the fourth reflective element 534 which are opposite in the vertical direction correspond; in fig. 5, shown by dotted lines are a first surface acoustic wave path from the lower side 501 to the upper side 502, and a second surface acoustic wave path from the upper side 502 to the lower side 501;

it is worth noting that, due to the number of first reflective elements 531 and the number of second reflective elements 532 used in figure 5 at the lower side 4501, and the number of third reflective elements 533 located at the upper side 502 is larger than the number of fourth reflective elements 534, therefore, the first reflective element 531, the second reflective element 532, the third reflective element 533 and the fourth reflective element 534 are not labeled one by one, instead, only one of the vertical lines on the right side of the lower side 501 is labeled as a first reflective element, the vertical lines on the left side of the lower side 501 are labeled as a second reflective element, the vertical lines on the right side of the upper side 502 are labeled as a third reflective element, and the vertical lines on the left side of the upper side 502 are labeled as a fourth reflective element;

and the surface acoustic wave paths shown by the dotted lines in fig. 5 are not all the first surface acoustic wave paths from the lower side 501 to the upper side 502 and all the second surface acoustic wave paths from the upper side 502 to the lower side 501, and in fact there are first surface acoustic wave paths between the corresponding first reflective elements and third reflective elements of each group and second surface acoustic wave paths between the corresponding fourth reflective elements and second reflective elements of each group;

the first surface acoustic wave emitters 511 are configured to emit surface acoustic waves to the N first reflective elements 531, respectively; each of the first reflective elements 531 is configured to reflect the surface acoustic wave to a corresponding third reflective element 533; the third reflecting element 533 is configured to reflect the surface acoustic wave to the first surface acoustic wave receiver 521, and the surface acoustic wave emitted by the first surface acoustic wave emitter 511 located at the right end of the lower side 501 sequentially passes through the first reflecting element 531 and the corresponding third reflecting element 533 and then is directed to the first surface acoustic wave receiver 521 located at the right end of the upper side 502;

the second surface acoustic wave transmitter 512 is configured to transmit surface acoustic waves to the M fourth reflective elements 534, respectively; each of the fourth reflective elements 534 is configured to reflect the surface acoustic wave to the corresponding second reflective element 532; the second reflection element 532 is configured to reflect the surface acoustic wave to the second surface acoustic wave receiver 522, and the surface acoustic wave emitted by the second surface acoustic wave emitter 512 located at the left end of the upper side 502 sequentially passes through the fourth reflection element 534 and the corresponding second reflection element 532 and then is emitted to the second surface acoustic wave receiver 522 located at the left end of the lower side 501;

as shown in fig. 5, a first touch scan/sense line 541, a second touch scan/sense line 542, a third touch scan/sense line 543, a fourth touch scan/sense line 544, a fifth touch scan/sense line 545, a sixth touch scan/sense line 546, a seventh touch scan/sense line 537, and an eighth touch scan/sense line 548 are sequentially disposed on the curved display panel from top to bottom.

Compared with the third embodiment shown in fig. 4, the area of the restricted area of the fourth embodiment of the touch device shown in fig. 5 of the present invention is greatly reduced, and the description of the restricted area of the fourth embodiment of the touch device shown in fig. 5 of the present invention is as follows:

the fourth embodiment of the touch device shown in fig. 5 of the present invention further includes a restricted protection structure;

the first limited region includes a region surrounded by the lower side 501 and a joint surface of the first surface acoustic wave transmitter 511 and the leftmost first reflecting element 531 provided on the lower side 501, the second limited region includes a region surrounded by the lower side 501 and a joint surface of the second surface acoustic wave receiver 522 and the rightmost second reflecting element 532 provided on the lower side 501, the third limited region includes a region surrounded by the upper side 502 and a joint surface of the first surface acoustic wave receiver 521 and the leftmost third reflecting element 532 provided on the upper side 502, and the fourth limited region includes a region surrounded by the upper side 502 and a joint surface of the second surface acoustic wave transmitter 512 and the rightmost fourth reflecting element 534 provided on the upper side 502; it is apparent that the total area of the confined region in fig. 5 is greatly reduced in area compared to the confined region in fig. 4.

In the third embodiment and the fourth embodiment of the touch device according to the present invention, in terms of the touch implementation manner, the surface acoustic wave type touch structure is used in the non-curved surface bending direction, and the other type (such as projected capacitive type) touch structure is used in the curved surface bending direction; touch events are respectively collected, and a processor for touch processing processes the events, so that a touch function is realized.

The third embodiment and the fourth embodiment of the touch device of the present invention comprehensively apply the surface acoustic wave touch method and other types (such as projected capacitive) touch technologies to the curved display panel, and can effectively reduce the complexity of the touch structure, improve the yield, and reduce the power consumption of the product on the premise of successfully implementing the touch function.

The third embodiment and the fourth embodiment of the touch device of the invention only need to arrange the touch scanning/sensing lines in the curved surface bending direction, so that the difficulty in design is greatly reduced, and the process requirement, the product yield and the cost have great advantages compared with the traditional touch implementation mode of the curved surface display panel.

Fig. 6 is a circuit structure block diagram of the first embodiment and the second embodiment of the touch device according to the present invention.

As shown in fig. 6, the processing unit employs an embedded touch processor, which serves as a control core of the entire touch device, is initialized by an EEPROM (Electrically Erasable Programmable Read-only memory) and provides a reference clock required for operation by a time base circuit (if the embedded touch processor itself can meet scanning and receiving requirements, this portion may not be required). When the touch system works, according to preset scanning conditions, the embedded touch processor generates high-speed scanning pulses, the capacitance driving circuit and the infrared scanning circuit are respectively driven to realize bidirectional scanning of the touch system through signal amplification, the capacitance sensing circuit and the infrared receiving circuit can receive effective touch events on the curved surface display panel, and the signals are processed through the band-pass filtering amplification circuit and the analog-to-digital conversion inside the embedded touch processor is realized to acquire the touch events; and finally, the touch coordinates are transmitted to a display system for processing through a display system touch interface through the storage inside the embedded touch processor.

Fig. 7 is a circuit structure block diagram of a third embodiment and a fourth embodiment of a touch device according to the present invention.

As shown in fig. 7, the processing unit employs an embedded touch processor, which serves as a control core of the entire touch device, is initialized by an EEPROM (Electrically Erasable Programmable Read-only memory) and provides a reference clock required for operation by a time base circuit (if the embedded touch processor itself can meet scanning and receiving requirements, this portion may not be required). When the touch system works, according to preset scanning conditions, the embedded touch processor generates high-speed scanning pulses, bidirectional scanning of the touch system is realized through signal amplification driving of the capacitance driving circuit and the surface acoustic wave scanning circuit, the capacitance sensing circuit and the surface acoustic wave receiving circuit can receive effective touch events on the curved surface display panel, and the signals are processed through the band-pass filtering amplification circuit and analog-to-digital conversion inside the embedded touch processor, so that the touch events are acquired; and finally, the touch coordinates are transmitted to a display system for processing through a display system touch interface through the storage inside the embedded touch processor.

In a specific embodiment, as shown in fig. 8, the processing unit 13 includes a first processing module 131 and a second processing module 132;

the first processing module 131 is connected to the touch wave receiving module 112, and the first processing module 131 is configured to determine whether a touch event exists in a non-bending direction according to whether the touch wave received by the touch wave receiving module 112 is blocked, detect a first touch coordinate in the non-bending direction when the touch event is determined to exist, and send a processing control signal to the second processing module 132;

the second processing module 132 is connected to the first processing module 131 and the sensing module 122, respectively, and the second processing module 132 is configured to detect a second touch coordinate in the bending direction according to the touch sensing signal from the sensing module 122 when receiving the processing control signal;

in this embodiment, the first processing module 131 is first used to detect whether touch occurs in the non-bending direction, and if so, the second processing module 132 is then used to detect the touch coordinate in the bending direction, so that time can be saved and the touch detection process can be optimized.

In a specific embodiment, as shown in fig. 9, the processing unit 13 includes a first processing module 131 and a second processing module 132;

the first processing module 131 is connected to the sensing module 122, and the first processing module 131 is configured to detect whether there is a touch parameter change according to a touch sensing signal from the sensing module 122, so as to determine whether there is a touch event in a bending direction, detect a second touch coordinate in the bending direction when there is the touch event, and send a processing control signal to the second processing module 132;

the second processing module 132 is connected to the first processing module 131 and the touch wave receiving module 112, respectively, and the second processing module 132 is configured to detect a first touch coordinate in a non-bending direction according to a position of a blocked position of the touch wave received by the touch wave receiving module 112 when receiving the processing control signal;

in this embodiment, the first processing module 131 detects whether touch occurs in the bending direction, and the second processing module 132 detects the touch coordinate in the non-bending direction if touch occurs in the bending direction, so as to save time and optimize the touch detection process.

When the above touch method is applied to the first embodiment or the second embodiment of the touch device of the present invention, as shown in fig. 10, the workflow of the touch device may be as follows:

firstly, a capacitance driving circuit for scanning the bending direction of the curved surface display panel is driven, if a touch event is sensed, the nearest touch scanning/sensing line of the touch event is judged, and a one-way touch coordinate (the touch coordinate in the non-bending direction of the curved surface display panel) is calculated and stored according to the touch scanning/sensing line; and if the touch event is not sensed, scanning again. After touch detection in the bending direction is finished, if a touch event exists, scanning an infrared emitter in the non-bending direction of the curved surface display panel, and if the touch event is not received, defining the event as a false touch event and repeatedly starting scanning; if the infrared touch event is successfully received, the nearest infrared receiver is judged, judgment, calculation and storage are carried out in the same way, the one-way touch coordinate (touch in the bending direction of the curved surface display panel) and the previous touch coordinate are sent together, and the touch detection period is finished.

In actual operation, it may also be determined whether a touch event exists in the non-bending direction of the curved display panel, and when a touch event exists in the non-bending direction, the touch coordinate in the bending direction is detected, and specifically which direction to scan first may depend on the precision, the actual needs, the power consumption, and other conditions.

When the above touch method is applied to the third embodiment or the fourth embodiment of the touch device of the present invention, as shown in fig. 11, the workflow of the touch device may be as follows:

firstly, a capacitance driving circuit for scanning the bending direction of the curved surface display panel is driven, if a touch event is sensed, the nearest touch scanning/sensing line of the touch event is judged, and a one-way touch coordinate (the touch coordinate in the non-bending direction of the curved surface display panel) is calculated and stored according to the touch scanning/sensing line; and if the touch event is not sensed, scanning again. After touch detection in the bending direction is finished, if a touch event exists, scanning a surface acoustic wave line emitter in the non-bending direction of the curved surface display panel, and if the touch event is not received, defining the event as a false touch event and repeatedly starting scanning; if the surface acoustic wave touch event is successfully received, judging the touch position according to the surface acoustic wave received by the surface acoustic wave receiver, judging, calculating and storing the touch position, sending the one-way touch coordinate (touch in the bending direction of the curved surface display panel) and the previous touch coordinate together, and finishing the touch detection period.

As shown in fig. 12, the touch method according to the embodiment of the present invention is applied to the touch device, and the touch method includes:

drive sensing step S1: the touch wave transmitting module transmits a touch wave to the touch wave receiving module; the touch wave receiving module receives the touch wave; the driving module sends a touch driving signal to the touch driving/sensing lines in a touch driving time period; the sensing module detects a touch sensing signal on the touch driving/sensing line in a touch sensing time period;

detection step S2: the processing unit judges whether a touch event exists in the non-bending direction according to whether the touch wave received by the touch wave receiving module is shielded or not, and detects a first touch coordinate in the non-bending direction when the touch event exists; the processing unit detects whether touch parameter changes exist according to the touch sensing signal so as to judge whether a touch event exists in the bending direction, and detects a second touch coordinate in the bending direction when the touch event exists.

Specifically, the processing unit includes a first processing module and a second processing module;

the detecting step specifically comprises:

The curved surface display device comprises a curved surface display panel and the touch device.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A touch device is applied to a curved surface display panel, the curved surface display panel comprises a first side edge and a second side edge which are oppositely arranged, and the first side edge and the second side edge are bent side edges; the touch device is characterized by comprising a first touch unit, a second touch unit and a processing unit;

2. The touch device of claim 1, wherein the touch waves specifically comprise infrared rays or surface acoustic waves;

the touch parameter includes a self-capacitance value or an impedance.

3. The touch device of claim 2, wherein the touch wave comprises infrared light;

and the infrared transmitter scans the infrared receiver.

4. The touch device of claim 2, wherein the touch wave comprises infrared light; the touch wave transmitting module comprises N infrared transmitters, and the touch wave receiving module comprises M infrared receivers; n and M are both positive integers, and N is less than M;

each infrared transmitter scans at least one infrared receiver in sequence;

5. The touch device of claim 2, wherein the touch wave comprises a surface acoustic wave; the touch wave transmitting module comprises a surface acoustic wave transmitter, and the touch wave receiving module comprises a surface acoustic wave receiver;

6. The touch device of claim 5, wherein the curved display panel further comprises a third side and a fourth side that are opposite and parallel to each other, and the third side and the fourth side are non-curved sides;

7. The touch device of claim 5, further comprising a restricted protection structure;

8. The touch device of claim 2, wherein the touch wave comprises a surface acoustic wave;

the touch wave receiving module further comprises N first reflecting elements arranged on the right side of the first side edge from right to left, M second reflecting elements arranged on the left side of the first side edge from left to right, N third reflecting elements arranged on the right side of the second side edge from right to left, and M fourth reflecting elements arranged on the left side of the second side edge from left to right; n and M are both positive integers;

9. The touch device as recited in claim 8, wherein when the first surface acoustic wave emitter is disposed at the right end of the first side and the second surface acoustic wave emitter is disposed at the left end of the second side,

10. The touch device of claim 8, wherein when the first surface acoustic wave emitter is disposed at a right end of the first side and the second surface acoustic wave emitter is disposed at a left end of the first side,

11. The touch device as recited in claim 8, wherein when the first surface acoustic wave emitter is disposed at a right end of the second side and the second surface acoustic wave emitter is disposed at a left end of the first side,

12. The touch device as recited in claim 8, wherein when the first surface acoustic wave emitter is disposed at a right end of the second side and the second surface acoustic wave emitter is disposed at a left end of the second side,

13. The touch device of any one of claims 9 to 12, wherein the second surface acoustic wave transmitter scans the second surface acoustic wave receiver while the first surface acoustic wave transmitter scans the first surface acoustic wave receiver; or,

14. The touch device of any one of claims 9-12, further comprising a restricted protection structure;

15. The touch device of any one of claims 1-12, wherein the processing unit comprises a first processing module and a second processing module;

16. The touch device of any one of claims 1-12, wherein the processing unit comprises a first processing module and a second processing module;

17. A touch method applied to the touch device of any one of claims 1 to 16, the touch method comprising:

18. The touch method of claim 17, wherein the processing unit comprises a first processing module and a second processing module;

the detecting step specifically comprises:

19. The touch method of claim 17, wherein the processing unit comprises a first processing module and a second processing module;

the detecting step specifically comprises:

20. A curved display device comprising a curved display panel, further comprising a touch device according to any one of claims 1 to 16.