CN106325582B

CN106325582B - Touch assembly with pressure detection function and driving method thereof

Info

Publication number: CN106325582B
Application number: CN201510404845.1A
Authority: CN
Inventors: 庄志成; 郑太狮; 连少芳
Original assignee: TPK Touch Solutions Xiamen Inc
Current assignee: TPK Touch Solutions Xiamen Inc
Priority date: 2015-07-10
Filing date: 2015-07-10
Publication date: 2023-07-28
Anticipated expiration: 2035-07-10
Also published as: TWI603243B; TWM533266U; CN106325582A; TW201702846A

Abstract

The invention provides a touch assembly with pressure detection, which comprises a three-dimensional sensor and a three-dimensional controller, wherein the three-dimensional sensor comprises a plurality of touch electrodes and at least one pressure detection electrode, the three-dimensional controller comprises a driver and a driving pulse processor, and the driver provides pressure scanning pulses for the at least one pressure detection electrode and provides touch scanning pulses for the plurality of touch electrodes under the cooperation of the driving pulse processor. The invention also provides a driving method of the touch control assembly with pressure detection, which comprises the following steps: the driver provides a pressure scanning pulse for the at least one pressure detection electrode under the cooperation of the driving pulse processor; and the driver provides touch scanning pulses for the plurality of touch electrodes. The touch control assembly with the pressure detection has the advantages of simple hardware design, high integration level, good noise resistance, simple driving method and the like.

Description

Touch assembly with pressure detection function and driving method thereof

[ field of technology ]

The present disclosure relates to touch devices, and particularly to a touch assembly with pressure detection and a driving method thereof.

[ background Art ]

With the development of technology, the touch assembly (touch Screen assembly) has been widely used in various consumer electronic devices, such as: portable electronic products such as smart phones, tablet computers, cameras, electronic books, MP3 players, etc., or display screens applied to operation control devices.

The existing electronic devices mostly adopt capacitive touch assemblies, and the capacitive touch assemblies work by utilizing current induction of a human body. A two-dimensional coordinate system (X, Y) is established by the surface of the touch surface, and a common capacitive touch assembly is provided with touch electrodes in the X direction and the Y direction in the plane. The coordinate positions of the touch points in the X direction and the Y direction are obtained through accurate calculation of the electric signal change at the touch points in the electronic equipment, namely, the two-dimensional positions of the touch points are determined, and then the operations of display, jump and the like of the electronic equipment are controlled.

In order to further enrich the functions of the touch assembly, some touch assemblies are currently equipped with pressure sensors, the pressure sensors include a plurality of pressure detection electrodes, the pressure detection electrodes at the touch points sense a pressing force from a direction perpendicular to the touch surface (corresponding to the Z-axis direction) and generate a certain deformation, so that an electrical signal of the pressure detection electrodes changes, and the pressure applied by the pressure detection electrodes can be determined by detecting the electrical signal. By detecting the pressure value, the device functions matched with different pressure values can be designed, for example, the same touch point can be matched with multiple functions under different forces. I.e. we can enrich the design from the three-dimensional angle defined by the touch points (X, Y) and the pressure (Z). However, today, the electronic devices are increasingly light, thin and low-priced, the pressure sensor is loaded to increase the thickness of the devices, so that the cost is greatly increased, and the touch electronic devices provided with the pressure sensor are required to be provided with a touch signal driver, a pressure signal driver, a touch signal processor and a pressure signal processor, so that the hardware design is very complex, and the overall integration level of the electronic devices is reduced.

[ invention ]

In order to solve the problem of complex hardware design of the existing electronic equipment with the pressure sensor, the invention provides the touch assembly with the pressure detection and the driving method thereof, wherein the touch assembly is simple in hardware design and high in integration level.

The invention provides a technical scheme for solving the technical problems: the touch assembly with the pressure detection comprises a three-dimensional sensor and a three-dimensional controller, wherein the three-dimensional sensor comprises a plurality of touch electrodes and at least one pressure detection electrode, the three-dimensional controller comprises a driver and a driving pulse processor, and the driver provides pressure scanning pulses for the at least one pressure detection electrode and provides touch scanning pulses for the plurality of touch electrodes under the cooperation of the driving pulse processor.

Preferably, the touch scanning pulse and the pressure scanning pulse are alternately performed in a time sequence, and a gap is formed between adjacent touch scanning pulses and pressure scanning pulses or a time gap is formed between adjacent touch scanning pulses and pressure scanning pulses.

Preferably, the touch scanning pulse and the pressure scanning pulse are performed at the same time sequence, a working period of the touch scanning pulse and a working period of the pressure scanning pulse are at least partially overlapped, and potential switching points of the touch scanning pulse and the pressure scanning pulse are staggered.

Preferably, the at least one pressure detecting electrode is a plurality of pressure detecting electrodes, the touch scanning pulses corresponding to the plurality of touch electrodes are performed in a synchronous sequence, and the potential switching points are staggered, and/or the pressure scanning pulses corresponding to the plurality of pressure detecting electrodes are performed in a synchronous sequence, and the potential switching points are staggered.

Preferably, a working period of the touch scanning pulse and/or the pressure scanning pulse includes n short pulses, and n is a positive integer.

Preferably, the touch scanning pulse frequency is 1-20 times of the pressure scanning pulse frequency.

Preferably, the driving pulse processor performs one or more of displacement, pulse width narrowing and frequency division on the touch scanning pulse and/or the pressure scanning pulse.

Preferably, the driving pulse processor comprises a selection circuit and/or a pulse reforming circuit, and the selection circuit, the pulse reforming circuit and the at least one pressure detection electrode are electrically connected in sequence.

Preferably, the three-dimensional controller further includes a touch signal receiving module, a pressure signal receiving module and an integrated processor, the plurality of touch electrodes are electrically connected to the touch signal receiving module, the at least one pressure detecting electrode is electrically connected to the pressure signal receiving module, and the touch signal receiving module and the pressure signal receiving module are electrically connected to the integrated processor.

Preferably, the at least one pressure detecting electrode is a plurality of pressure detecting electrodes, the internal resistances of the pressure detecting electrodes are RF0, RF1, RF2, RFn, resistors RC0, RC1, RC2, RCn, RF1, RF2, RFn and RC0, RC1, RC2, RCn are reference resistors, the touch control assembly with pressure detection further comprises a pressure signal processor, the pressure signal processor comprises a resistor Ra, a resistor Rb, the multiplexer MUX1 and the multiplexer MUX2, RF0, RF1, RF2, RFn are connected to the input end of the multiplexer MUX1, RC0, RC1, RC2, RCn are connected to the input end of the multiplexer MUX2, the multiplexer MUX1 and the multiplexer MUX2 respectively select matched resistors RFn and RCn to output and form a Wheatstone bridge with the resistors Ra and Rb, and the variation of the resistance values of the RF0, RF1, RF2, RFn is related to the compression force value received by the resistance values.

Preferably, the plurality of touch electrodes and the at least one pressure detection electrode are disposed in the same plane, the plurality of touch electrodes include a plurality of first direction touch driving electrodes parallel to each other and a plurality of second direction touch receiving electrodes parallel to each other, a certain included angle is formed between the first direction touch driving electrodes and the second direction touch receiving electrodes, a non-touch area is disposed between the plurality of first direction touch receiving electrodes, the at least one pressure detection electrode is disposed in the non-touch area, an overlapping area is formed between the at least one pressure detection electrode and the plurality of first direction touch driving electrodes parallel to each other and the plurality of second direction touch receiving electrodes parallel to each other, and an insulating block is disposed between the plurality of first direction touch driving electrodes parallel to each other and the plurality of second direction touch receiving electrodes in the overlapping area.

Preferably, the plurality of touch electrodes and the at least one pressure detection electrode are disposed in the same plane, the plurality of touch electrodes include a plurality of first direction touch driving electrodes and a plurality of second direction touch receiving electrodes, there is no overlapping area between the first direction touch driving electrodes and the second direction touch receiving electrodes, a non-touch area is disposed between the plurality of first direction touch driving electrodes or the plurality of second direction touch receiving electrodes, or between the plurality of first direction touch driving electrodes and the plurality of second direction touch receiving electrodes, and the at least one pressure detection electrode is disposed in the non-touch area.

Preferably, the plurality of touch electrodes include a plurality of first touch driving electrodes parallel to each other and a plurality of second touch receiving electrodes parallel to each other, the plurality of first touch electrodes parallel to each other and the plurality of second touch electrodes parallel to each other are located on different substrate layers or disposed in different planes of the same substrate layer, a non-touch area is disposed between the plurality of first touch driving electrodes parallel to each other, and the at least one pressure detecting electrode is disposed in the non-touch area.

Preferably, the touch assembly with pressure detection includes at least a first pressure layer and a second pressure layer, the first pressure layer and the second pressure layer are provided with the at least one pressure detection electrode, and at least the first pressure layer and the touch electrode are located on the same plane.

Preferably, the pressure scanning pulse received by the pressure detecting electrode of the first pressure layer and the pressure scanning pulse received by the pressure detecting electrode of the second pressure layer are performed in a time sequence.

Preferably, the first pressure layer, the second pressure layer and the plurality of touch electrodes receive pressure scanning pulses and/or touch scanning pulses at the same time sequence, and their respective potential switching points are staggered.

The invention also provides a driving method of a touch assembly with pressure detection, the touch assembly with pressure detection comprises a three-dimensional sensor and a three-dimensional controller, the three-dimensional sensor comprises a plurality of touch electrodes and at least one pressure detection electrode, the three-dimensional controller comprises a driver and a driving pulse processor, and the method comprises the following steps: the driver provides a pressure scanning pulse for the at least one pressure detection electrode under the cooperation of the driving pulse processor; and the driver provides touch scanning pulses for the plurality of touch electrodes.

Preferably, the driving pulse processor performs one or more operations of shifting, narrowing and frequency dividing on an input signal thereof, and the potential switching point between the pressure scanning pulse and the touch scanning pulse is not overlapped.

Preferably, the pressure scanning pulse and the touch scanning pulse are performed in a time sequence or a simultaneous time sequence.

Compared with the prior art, the touch control assembly with pressure detection has the following advantages:

1. the touch control assembly with the pressure detection function not only can detect the position of a touch control point, but also can detect the pressure value of the touch control point. The touch sensor and the pressure sensor are driven by the same driver, so that the hardware cost is saved, the circuit design is simplified, the integration level of the touch assembly with pressure detection is improved, and the thickness and the weight of the touch assembly with pressure detection are reduced to a certain extent. Compared with the prior art that different drivers are adopted to drive the touch sensor and the pressure sensor respectively, the touch sensor and the pressure sensor are structurally close to each other, the design space is small, the arrangement of components is closely unfavorable for heat dissipation, and the invention well solves the problems.

2. Because the capacitive touch assembly adopts the principle of human body induced current to detect touch points, when the touch electrode and the pressure detection electrode are arranged on the same substrate layer, the arrangement between the components and the conductive wires is very close, the mutual interference between signals is very serious, and the touch point position detection and/or the pressing force value detection are not accurate. The invention skillfully processes the driving signals output by the driver through the selection circuit and/or the pulse reforming circuit to achieve that the same driver can provide corresponding scanning pulses for the touch sensor and the pressure sensor, the driving signals are displaced through the selection circuit and/or the pulse reforming circuit, the pressure scanning pulses and the touch scanning pulses provided after the pulse width narrowing, frequency dividing and other processes can be processed in a time-sharing sequence or a synchronous sequence, and the pressure scanning pulses and the touch scanning pulses are processed simultaneously in the same time sequence, but potential switching points between the pressure scanning pulses and the touch scanning pulses are staggered mutually, so that the touch assembly with pressure detection has high reaction speed, the interference between signals is reduced, and the touch stability is good. In time sequence, the pressure scanning pulse and the touch scanning pulse are carried out in time intervals, so that the interference between electric signals is also reduced, and the touch stability of the touch assembly with pressure detection is greatly improved.

3. The invention adopts the Wheatstone bridge to detect the pressing force value, and has simple circuit structure and high control precision. The most important pressure signal processor adopts the combination of an electric bridge and a multiplexer, and selects different pressure detection electrodes through the multiplexer, but in a Wheatstone bridge formed by the different pressure detection electrodes when detecting pressure signals, the resistors Ra and Rb are shared resistors, so that the number of the resistors in the Wheatstone bridge can be greatly reduced, and when the different pressure detection electrodes perform pressure detection, the error rates among the different pressure detection electrodes are reduced because part of hardware sharing. Furthermore, the internal resistances RF0, RF1, RF2, RFn corresponding to the pressure detection electrodes are provided with RC0, RC1, RC2, RCn as reference resistors, and the reference resistors are arranged near the RF0, RF1, RF2, RFn, so that the influence of the temperature on the reference resistors is consistent, other received noise is similar, the stability of the Wheatstone bridge is facilitated, and the signal misjudgment caused by the temperature drift of the hardware circuit and environmental factors is reduced. RF0, RF1, RF2 RFn and RC0, RC1, RC2 RCn are referenced resistances to each other, thus reducing noise and optimizing allocation of resources. The output signal of the wheatstone bridge is connected with an operational amplification circuit, and the operational amplification circuit not only can amplify the output signal U0, but also can reduce noise by utilizing the characteristic that the operational amplification circuit suppresses noise. Taking RF0 and RC0 as an example, when the upper substrate receives a pressing force, the resistance value of RF0 changes to Δr, but actually, when RF0 receives a noise such as temperature and other disturbances, Δs (Δs is a noise resistance change signal including a part of noise due to temperature change and a part of interference noise due to electric signals), and when reference resistance RC0 receives a noise such as temperature and other disturbances consistent with RF0 in the vicinity thereof, the noise Δs is cancelled by the noise received by RF0 at the same direction input end after the reverse input end of the operational amplifier circuit passes through the operational amplifier circuit, and thus, Δr is not only doubled, but also noise such as temperature and other disturbances generated by Δs is eliminated, and the detection accuracy of the pressing force value is further improved.

4. In the invention, the pressure detection electrode is arranged in the non-touch area of the touch electrode, and the pressure detection electrode and the touch electrode can be integrated on the same plane through the arrangement of the insulating block, so that the thickness of the touch assembly with pressure detection is greatly reduced, and particularly, the pressure detection electrode and the pressure detection electrode are complementarily arranged, so that the display effect of the touch assembly with pressure detection is better.

[ description of the drawings ]

Fig. 1 is a schematic diagram of a layered structure of a touch assembly with pressure detection according to a first embodiment of the invention.

FIG. 2 is a schematic plan view of an electrode pattern layer of a touch assembly with pressure detection according to a first embodiment of the present invention.

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

Fig. 4A is a schematic circuit block diagram of a touch assembly with pressure detection according to a first embodiment of the present invention.

Fig. 4B is a schematic circuit structure diagram of a touch assembly with pressure detection according to a first modified embodiment of the invention.

FIG. 5 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a first embodiment of the present invention.

Fig. 6 is a schematic circuit diagram of the voltage signal processor in fig. 4A.

FIG. 7 is a schematic diagram of the pressure signal detection of FIG. 6.

FIG. 8 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a second embodiment of the present invention.

FIG. 9 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a third embodiment of the present invention.

Fig. 10a and 10b are timing diagrams of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a fourth embodiment of the present invention.

FIG. 11 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a fifth embodiment of the present invention.

Fig. 12 is a schematic circuit block diagram of a touch assembly with pressure detection according to a sixth embodiment of the invention.

FIG. 13 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a sixth embodiment of the present invention.

FIG. 14 is a schematic plan view of an electrode pattern layer of a touch assembly with pressure detection according to a seventh embodiment of the invention.

Fig. 15 is a schematic diagram of a layered structure of a touch assembly with pressure detection according to an eighth embodiment of the invention.

Fig. 16 is a schematic plan view of the electrode pattern layer of fig. 15.

Fig. 17 is a schematic diagram of a touch assembly with pressure detection according to a ninth embodiment of the invention.

FIG. 18 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a ninth embodiment of the present invention.

FIG. 19 is a timing diagram of touch scan pulses and pressure scan pulses of a touch assembly with pressure detection according to a tenth embodiment of the present invention.

FIG. 20A is a flowchart illustrating a driving method of a touch assembly with pressure detection according to an eleventh embodiment of the present invention.

FIG. 20B is a flowchart illustrating a driving method of a touch assembly with pressure detection according to a twelfth embodiment of the present invention.

[ detailed description ] of the invention

For the purpose of making the technical solution and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples of implementation. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, a touch assembly (touch Screen assembly) with pressure detection 10 according to a first embodiment of the present invention includes an upper substrate 11, a bonding layer 12, an electrode pattern layer 13, a substrate layer 14, and a signal processing circuit 15 from top to bottom (the words of top, bottom, left, right, etc. are only limited to the relative positions in the designated view, and not absolute positions), wherein the electrode pattern layer 13 and the signal processing circuit 15 are connected by conductive wires (not shown).

The upper substrate 11 may be considered as a touch cover plate on a conventional touch assembly, and the cover plate includes a touch operation surface and a component mounting surface, wherein the touch operation surface is used for performing touch operation by a finger or a stylus, and the component mounting surface is used for mounting a touch electrode component or a display module. The upper substrate 11 may be made of PEEK (polyethylenteroethyl polyether ether ketone), PI (Polyimide), PET (polyethylene terephthalate), PC (polycarbonate), PES (polyethylene succinate), PMMA (polymethyl methacrylate), or a composite of any two thereof.

The adhesive layer 12 may be OCA (optically clear adhesive, optical Clear Adhesive) or LOCA (liquid optically clear adhesive, liquid Optical Clear Adhesive).

The material of the substrate layer 14 may be a flexible substrate, or may be a rigid substrate, such as glass, reinforced glass, sapphire glass, PI (polyimide), PC (polycarbonate), polyethersulfone (PES), polymethyl methacrylate (PMMA), acryl, polyacrylonitrile-butadiene-styrene (ABS), polyamide (PA), polybenzimidazole Polybutene (PB), polybutylene terephthalate (PBT), polyester (PE), polyetheretherketone (PEEK), polyetherimide (PEI), polyetherimide, polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), polytetrafluoroethylene (PTFE), polyurethane (PU), polyvinyl chloride (PVC) L-type polylactic acid (PLLA), and the like. The base material layer 14 is a carrier layer of the electrode pattern layer 13, and is bonded to the lower surface of the upper substrate 11 through the bonding layer 12.

The signal processing circuit 15 is disposed below the substrate layer 14, and its position is not limited, and it may be disposed above or on one side of the substrate layer 14.

Referring to fig. 2 and 3, a three-dimensional sensor (not numbered) is disposed on the electrode pattern layer 13, and the three-dimensional sensor includes a pressure sensor 16 and a touch sensor 17, and the pressure sensor 16 includes at least one pressure detecting electrode 161. The touch sensor 17 includes touch electrodes: the plurality of first direction touch driving electrodes 171 disposed in the X direction and the plurality of second direction touch receiving electrodes 172 disposed in the Y direction (in fig. 2, the number of the first direction touch driving electrodes 171, the 4 second direction touch receiving electrodes 172, and the 4 pressure detecting electrodes 161 are respectively illustrated as examples, in practice, the number is not limited, and the number of the pressure detecting electrodes 161 may be smaller or larger than the number of the first direction touch driving electrodes 171 or the second direction touch receiving electrodes 172). In this embodiment, the X direction is orthogonal to the Y direction, but the included angle between the X and Y directions is not limited. The plurality of first direction touch driving electrodes 171 arranged in parallel with each other are orthogonal to the plurality of second direction touch receiving electrodes 172 arranged in parallel with each other, and an insulating block 173 is disposed between the first direction touch driving electrodes 171 and the second direction touch receiving electrodes 171 at the overlapping area of the two. In addition to the overlapping area, a non-touch area 174 is disposed between the plurality of first direction touch driving electrodes 171, the pressure detecting electrode 161 is disposed in the non-touch area 174, and an insulating block 173 is disposed in the overlapping area between the pressure detecting electrode 161 and the second direction touch receiving electrode 172, that is, the insulating block 173 covers the overlapping area between the first direction touch driving electrode 171, the second direction touch receiving electrode 172 and the pressure detecting electrode 161, so that the first direction touch driving electrode 171, the second direction touch receiving electrode 172 and the pressure detecting electrode 161 are electrically insulated. Optimally, the shape of the pressure detecting electrode 161 is complementary to the shape of the first direction touch driving electrode 171 and the second direction touch receiving electrode 172. The pressure detecting electrode 161, the first direction touch driving electrode 171 and the second direction touch receiving electrode 172 may be made of ITO or metal conductive wires or nano silver wire conductive layers.

Referring to fig. 4A, the signal processing circuit 15 includes a three-dimensional controller 18 and a pressure signal processor 19, and the pressure signal processor 19 is electrically connected to the three-dimensional controller 18. The pressure sensor 16 is electrically connected to the three-dimensional controller 18 and the pressure signal processor 19. The touch sensor 17 is electrically connected to the three-dimensional controller 18.

The pressure signal processor 19 processes the pressure signal transmitted from the pressure sensor 16, and includes a bridge 191 and a multiplexer 192, wherein the multiplexer 192 is electrically connected to the bridge 191.

The three-dimensional controller 18 includes a driver 181, a driving pulse processor 187, a touch signal receiving module 182, a pressure signal receiving module 183 and an integrated processor 186, wherein the driving pulse processor 187 includes a selection circuit 184, a pulse reforming circuit 185, and the selection circuit 184 and the pulse reforming circuit 185 are used for processing the driving signal outputted from the driver 181. The driving signal is supplied to the pressure sensor 16 via the selection circuit 184 and the pulse reforming circuit 185 to control the timing of detecting the pressing force value received by the pressure detecting electrode 161. The driver 181 directly provides the touch sensor 17 with a touch scan pulse through the selection circuit 184 to control the timing of detecting the touch point. The pressure sensor 16 detects a pressure signal and then transmits the pressure signal to the pressure signal processor 19, and the pressure signal processor 19 processes the pressure signal and then transmits the pressure signal to the pressure signal receiving module 183 in the three-dimensional controller 18. The touch sensor 17 transmits the touch signal to the touch signal receiving module 182 after detecting the touch signal. The integrated processor 186 performs processing such as operation on the electrical signals of the touch signal receiving module 182 and the pressure signal receiving module 183.

The selection circuit 184 selects a part of the driving signals (the first set of timings) from the driver 181 to transmit as the touch scan pulse to the touch sensor 17, and the selection circuit 184 selects another part of the driving signals (the second set of timings) from the driver 181 to transmit to the pulse reforming circuit 185, and outputs the pressure scan pulse to the pressure sensor 16 after signal processing by the pulse reforming circuit 185.

The selection circuit 184 selects a part of the driving signals from the driving signals to be outputted, and the pulse reforming circuit 185 may perform processes such as displacement, pulse width narrowing, frequency division, etc. on the output signals in the driver 18 and/or the selection circuit 184. Referring to fig. 4B, as a modification, the driver 181 directly provides the touch sensor 17 with a touch scan pulse, and the driving signal provides the pressure sensor 16 with a pressure scan pulse after passing through the selection circuit 184 and the pulse reforming circuit 185. In practice, the driving pulse processor 187 may be provided with only the pulse reforming circuit 185 and/or the selection circuit 184, and the processing of the driving signal may be performed by the selection circuit 184 or the pulse reforming circuit 185. The pressure signal processor 19 may be provided separately from the three-dimensional controller 18, preferably on the same chip.

Referring to fig. 5, the driver 18 provides driving signals, which are processed by the selection circuit 184 and the pulse reforming circuit 185 to form a touch scan pulse and a pressure scan pulse timing chart as shown in fig. 5 (all the timing charts of the present invention only use specific sets of timing charts to represent the variation trend of the electrical signals, the actual number of the timing charts matches the first direction touch driving electrode 171, the second direction touch receiving electrode 172 and the pressure detecting electrode 161), and vt_1, vt_2 and vt_3 represent the touch scan pulse update timings of three different first direction touch driving electrodes 171, and the touch electrodes detect the touch point positions of a finger or a touch pen according to the touch scan pulse timings; vf_1, vf_2 and vf_3 represent the pressure scanning pulse update timings of three different pressure detection electrodes, and the pressure detection electrode 161 detects the magnitude of the pressing force at the touch point according to the pressure scanning pulse timings. The touch scanning pulses and the pressure scanning pulses are staggered and alternate with each other without time gaps, and the touch scanning pulses and the pressure scanning pulses are performed in time sequence, so that the mutual electrical interference can be avoided.

Referring to fig. 6, the pressure signal processor 19 includes a bridge 191 and a multiplexer 192, the multiplexer 192 includes a first multiplexer MUX1, a second multiplexer MUX2, the bridge 191 (the resistors RF0, RC0 and Ra and Rb form a wheatstone bridge) includes at least one resistor Ra, at least one resistor Rb and an operational amplifier circuit (not numbered), the output terminals of the first multiplexer MUX1 and the second multiplexer MUX2 are respectively electrically connected to the non-inverting input terminal and the inverting input terminal of the operational amplifier circuit as the input signal U0 of the operational amplifier circuit, and the output terminal of the operational amplifier circuit is connected to the filter circuit 193 and the ADC circuit 194, so that the electrical signal output by the operational amplifier circuit can be subjected to denoising processing by the filter circuit 193 and then transferred to the ADC circuit 194 for analog-digital conversion. The output end of the first multiplexer MUX1 is connected to one end of a resistor Ra, and the other end of the resistor Ra is electrically connected to the positive electrode end VEX+ of the excitation source; the output end of the second multiplexer MUX2 is connected to one end of a resistor Rb, and the other end of the resistor Rb is electrically connected to the positive electrode vex+ of the excitation source. In the related embodiment, the excitation source is configured by a single power supply or a dual power supply, but not limited thereto, and the excitation signal may be a square wave, a sine wave or a constant voltage signal, and the signal type is not limited thereto; preferably, the excitation source may be configured to excite the pressure sensor 16 and detect changes using the pressure sweep pulse with square wave type sweep pulse as the excitation source in each of the embodiments disclosed herein.

The input end of the first multiplexer MUX1 is connected to a first plurality of pressure detection electrodes 161 of the pressure sensor 16, and internal resistances corresponding to the first plurality of pressure detection electrodes 161 are RF0, RF1, RF2 RFn, and when a user touches the upper substrate 11 to generate a certain pressure, resistance values of the internal resistances RF0, RF1, RF2 RFn corresponding to the first plurality of pressure detection electrodes 161 under the upper substrate 11 will change. The first multiplexer MUX1 may select the first multiplexer of RF0, RF1, one of the resistors of RF2 RFn is used as its input.

Connected to the input of the second multiplexer MUX2 is a second plurality of pressure detection electrodes 161 of the pressure sensor 16, the second plurality of pressure detection electrodes 161 having internal resistances RC0, RC1, RC2, RFn being disposed in one-to-one matching adjacent to RF0, RF1, RF2, RFn, for example RC0 being disposed in the vicinity of RF0, RC1 being disposed in the vicinity of RF1, and so on. Resistors RC0, RC1, RC2, RCn are set as reference resistors for RF0, RF1, RF2, RFn, respectively, and one of the resistors RC0, RC1, RC2, RCn may be selected as its input by the second multiplexer MUX 2. RC0, RC1, RC2 and RCn are used as reference resistors of RF0, RF1 and RF2 when the pressure detection electrode 161 corresponding to RF0, RF1 and RF2 and RFn is pressed; conversely, when the pressure detection electrode 161 corresponding to RC0, RC1, RC2 and RCn receives a pressing force, RF0, RF1, RF2 and RFn are the reference resistances of RC0, RC1, RC2 and RCn, and one ends of them are connected to the positive electrode VEX-of the excitation source.

Referring to fig. 7, the operation principle of the pressure sensor 16 will be described by taking the example that the first multiplexer MUX1 selects RF0 and the second multiplexer MUX2 selects RC 0. The resistor RF0, the resistor RC0, and the resistors Ra and Rb form a wheatstone bridge, which is in a balanced state when no pressing force acts. The excitation source provides a regulated power supply to bridge 191, which is preferably a dc regulated power supply in this embodiment, regardless of the polarity of its positive and negative poles. When the user operates the upper substrate 11, he or she has a pressing force to the upper substrate 11, and one or more resistance values corresponding to RF0, RF1, RF2, RFn in the pressure detection electrode 161 are changed, so that, the output electric signal U0 must change due to the break of the balance of the Wheatstone bridge, and the change of different resistance values corresponds to different pressure values, so that the corresponding pressure values can be obtained by calculating and processing the output signal U0 of the Wheatstone bridge. In practice, we can also set a shared fixed resistor to replace RC0, RC1, RC2 RCn as needed.

Compared with the prior art, the touch control assembly 10 with pressure detection provided by the invention has the following advantages:

1. The touch assembly 10 with pressure detection can detect not only the position of a touch point, but also the pressure value of the touch point. The touch sensor 17 and the pressure sensor 16 are driven by the same driver 181, which saves hardware cost, simplifies circuit design, improves the integration level of the touch assembly 10 with pressure detection, and reduces the thickness and weight of the touch assembly 10 with pressure detection to a certain extent. The touch sensor 17 and the pressure sensor 16 are structurally close to each other, and if different drivers 181 are adopted to drive the touch sensor 17 and the pressure sensor 16 respectively, the design space is smaller, the arrangement of components is closely unfavorable for heat dissipation, and the invention well solves the problem.

2. Because the capacitive touch assembly adopts the principle of human body induced current to detect the touch point, when the touch electrode and the pressure detection electrode 161 are arranged on the same substrate layer 14, the arrangement between the components and the conductive wires is very close, and the signals are very serious, so that the touch point detection position is inaccurate. In the invention, the driving signals output by the driver 181 are processed by the selection circuit 184 and/or the pulse reforming circuit 185 to achieve that the same driver 181 can provide corresponding scanning pulses for the touch sensor 17 and the pressure sensor 16, the driving signals are shifted by the selection circuit 184 and/or the pulse reforming circuit 185, the pressure scanning pulses and the touch scanning pulses provided after the pulse width narrowing, frequency dividing and other processes can be processed in a time-sharing sequence or a simultaneous sequence, and the pressure scanning pulses and the touch scanning pulses are processed simultaneously in the same time sequence, but potential switching points between the pressure scanning pulses and the touch scanning pulses are staggered, so that the touch assembly 10 with pressure detection has high reaction speed, reduced interference between signals and better touch stability. In the time sequence, the pressure scanning pulse and the touch scanning pulse are performed in time intervals, so that the interference between the electric signals is also reduced, and the touch stability of the touch assembly 10 with pressure detection is greatly improved.

3. The invention adopts the Wheatstone bridge to detect the pressing force value, and has simple circuit structure and high control precision. The most important of said pressure signal processors 19 are combined by multiplexing with a multiplexer 192 using a bridge 191The different pressure detecting electrodes 161 are selected by the device 192, but in the wheatstone bridge formed by the different pressure detecting electrodes 161 when detecting pressure signals, the resistors Ra and Rb are shared resistors, so that the number of resistors in the wheatstone bridge can be greatly reduced, and when the different pressure detecting electrodes 161 are used for pressure detection, the error rates between the different pressure detecting electrodes are reduced due to the fact that part of hardware is shared. Furthermore, the internal resistances RF0, RF1, RF2, RFn corresponding to the pressure detecting electrode 161 are provided with RC0, RC1, RC2, RCn as reference resistors, and the reference resistors are disposed near the internal resistances RF0, RF1, RF2, RFn, so that the temperature influences between them are consistent, and other noise received by them is similar, which is favorable to the stability of the wheatstone bridge, and reduces the signal misjudgment caused by the temperature drift of the hardware circuit and environmental factors. RF0, RF1, RF2 RFn and RC0, RC1, RC2 RCn are referenced resistances to each other, thus reducing noise and optimizing allocation of resources. The output signal of the wheatstone bridge is connected with an operational amplification circuit, and the operational amplification circuit not only can amplify the output signal U0, but also can reduce noise by utilizing the characteristic that the operational amplification circuit suppresses noise. Taking RF0 and RC0 as an example, when the upper substrate 11 receives a pressing force, the resistance value of RF0 changes to Δr, but actually, when RF0 receives temperature and other disturbances, Δs (Δs is a noise resistance change signal including a part of noise due to temperature change and a part of interference noise due to electric signals) is generated, and when reference resistance RC0 receives noise such as temperature and other disturbances in the vicinity of RF0, the noise Δs is cancelled by noise of varistor RF0 at the same direction input end after the reverse input end of the operational amplifier circuit passes through the operational amplifier circuit, and thus, Δr is doubled, noise such as temperature and other disturbances is also eliminated, and the detection accuracy of the pressure signal is further improved. In practice, any possible noise cancellation method for the operational amplifier circuit may be used, for example, u=a ((v+) - (V-)) =a ((V-) _△r +V _△s )-(-V _△r +V _△s ))＝2A V _△r The Δs is an externally induced noise effect that is not affected by the reverse voltage, and the differential amplifier or the amplifier combination is not limited to this, so long as the circuit protection method capable of eliminating the externally induced noise effect is the protection scope of the present invention.

4. In the embodiment, the pressure detection electrode 161 is disposed in the non-touch area 174 of the touch electrode, and the pressure detection electrode 161 and the touch electrode can be integrated on the same plane through the arrangement of the insulation block 173, so that the thickness of the touch assembly 10 with pressure detection is greatly reduced, and particularly, the display effect of the touch assembly 10 with pressure detection can be better due to the complementary arrangement between the touch electrode and the pressure detection electrode 161.

Referring to fig. 8, a touch assembly (not numbered) with pressure detection according to a second embodiment of the present invention is provided, and the touch assembly with pressure detection is different from the touch assembly with pressure detection 10 according to the first embodiment only in that: in this embodiment, the touch scan pulse and the pressure scan pulse are processed in separate time sequences, so that a time gap exists between adjacent pressure scan pulses and touch scan pulse, for example, the touch scan pulse in vt_1 switches the potential at time t1 and time t2, the pressure scan pulse in vf_1 is smaller than the touch scan pulse in width, the potential point is switched at time t3 and time t4, t1 < t2 < t3 < t4, that is, the pressure scan pulse signal of the pressure detection electrode is not started at the potential switching point of the touch scan pulse, and the touch electrode is easily interfered by the outside to cause inaccurate detection of the touch point.

Referring to fig. 9, a third embodiment of the present invention provides a touch assembly (not numbered) with pressure detection, which is different from the touch assembly 10 with pressure detection of the first embodiment only in that: in this embodiment, the touch scanning pulse and the pressure scanning pulse are performed in separate time sequences, and 1 pressure scanning pulse includes a plurality of short pulses to reduce noise, and fig. 9 illustrates only 3 short pulses as an example, and the number of short pulses may be 2 or more.

Referring to fig. 10a and 10b, a touch assembly (neither reference numeral) with pressure detection is provided in the fourth embodiment of the present invention, and the touch assembly with pressure detection is different from the touch assembly 10 with pressure detection of the first embodiment only in that in the present embodiment, the touch scan pulse and the pressure scan pulse are performed simultaneously, in fig. 10a, the pulse width of the pressure scan pulse is narrowed to stagger the potential switching point of the touch scan pulse, for example, the touch scan pulse in vt_1 switches the potential at time t11 and time t21, the pulse width of the pressure scan pulse in vf_1 is smaller than the pulse width of the touch scan pulse in vt_1, and the potential point is switched at time t31 and time t41, t11 < t31, and t21 > t41. That is, the pulse signal of the pressure sensor is not started when the touch scanning pulse potential is switched, and even if the interference signal is generated, the possibility of mutual interference is avoided. At the potential switching point of the pressure scanning pulse, the touch scanning pulse is in the signal stabilization period, so that the pressure scanning pulse is not greatly interfered. In fig. 10b, the mutual interference between the electric signals is avoided by avoiding the potential switching point, and in fig. 10b, the potential switching point between the pressure scanning pulse and the touch scanning pulse is also shifted, and the pressure scanning pulse comprises a plurality of short pulses to reduce noise.

In all embodiments of the present invention, the same timing refers to the overlapping of the duty cycle of the pressure scan pulse (excluding the end of the timing diagram) during one duty cycle of the touch scan pulse (the potential is "1"). Otherwise, the time sequence is time-sharing.

Referring to fig. 11, a fifth embodiment of the present invention provides a touch assembly (not numbered) with pressure detection, which is different from the touch assembly with pressure detection of the first embodiment only in that: the pulse width of the pressure scanning pulse is narrowed, the potential switching point of the touch scanning pulse is staggered, and the pulse frequency is lower than that of the touch scanning pulse. Because the scanning frequency of the touch assembly with pressure detection on the touch electrode is required to be greater than or equal to the scanning frequency of the touch assembly with pressure detection on the pressure detection electrode, the aim of pressure detection can be achieved by reducing the scanning frequency of the pressure scanning pulse relative to the scanning frequency of the touch scanning pulse, and the energy consumption of the touch assembly with pressure detection is reduced. The touch scanning pulse frequency can be adjusted by 1-20 times of the pressure scanning pulse frequency.

Referring to fig. 12, a sixth embodiment of the present invention provides a touch assembly (not numbered) with pressure detection, which is different from the touch assembly 10 with pressure detection of the first embodiment only in that: the drive pulse processor 687 of the touch assembly with pressure detection includes multiplexing circuitry and pulse reforming circuitry: the first selection circuit 684a, the first pulse reforming circuit 685a, the second selection circuit 684b, the second pulse reforming circuit 685b, the nth selection circuit 684n and the nth pulse reforming circuit 685n provide excitation signals for different touch electrodes and pressure detection electrodes.

Referring to fig. 13, 2 sets of touch electrodes and pressure detection electrodes (not numbered) are taken as examples to illustrate the touch scan pulse and the pressure scan pulse output by the driving pulse processor 687, the settings vt_1 and vt_2 are respectively the scan pulse signals received by the touch driving electrode 1 and the touch driving electrode 2 in the first direction on the touch sensor 66, the settings vf_1 and vf_2 are respectively the pressure scan pulse signals received by the pressure detection electrode 1 and the pressure detection electrode 2 on the pressure sensor 67, the touch scan pulse and the pressure scan pulse are performed in a time-sharing manner, one pulse period of the touch scan pulse is tz, which is composed of a plurality of short pulses td, at this time, ts (ts < tz, ts not equal to a positive integer) exist between the touch scan pulse starting potential switching points between the touch driving electrode 1 and the touch driving electrode 2, when the touch driving potential of the touch driving electrode 1 and the touch driving electrode 2 in the first direction is not interfered by the touch driving electrode 2, and the touch driving potential of the touch driving electrode 22 is not interfered by the first direction 1, at this moment, and the touch driving potential of the touch driving electrode 22 is not interfered by the touch driving direction 1 is not being significantly. Similarly, the voltage scanning pulse between the voltage detection electrode 1 and the voltage detection electrode 2 is also shifted in the potential switching point, so that the electric signal interference between the voltage detection electrodes is reduced. The potential switching point dislocation technique in the present embodiment is also applicable to other embodiments.

Referring to fig. 14, a seventh embodiment of the present invention provides a touch assembly (not numbered) with pressure detection, which is different from the touch assembly 10 with pressure detection of the first embodiment only in that: the touch electrodes (not numbered) have no overlapping area, i.e. there is no overlapping area between the first direction touch driving electrode 771 and the second direction touch receiving electrode 772, and the pressure detecting electrode 761 is disposed in the non-touch area 774 formed between the two, so that the problem that the circuit between the touch electrodes and the pressure detecting electrode 761 is easy to break due to overlapping can be avoided. Optimally, the first direction touch driving electrode 771, the second direction touch receiving electrode 772 and the pressure detecting electrode 761 are complementarily designed. The pattern shapes of the first direction touch driving electrode 771 and the second direction touch receiving electrode 772 are not limited, and may be rectangular, triangular or other irregular shapes.

Referring to fig. 15, an eighth embodiment of the present invention provides a touch assembly 80 with pressure detection, wherein the touch assembly 80 with pressure detection is different from the touch assembly 10 with pressure detection of the first embodiment only in that: the touch assembly 80 with pressure detection includes, from top to bottom, an upper substrate 81, a bonding layer 82, a first electrode pattern layer 83, a first substrate layer 84, a second electrode pattern layer 86, a second substrate layer 87, and a signal processing circuit 85, wherein the first substrate layer 84 and the second substrate layer 87 are respectively used as bearing layers of the first electrode pattern layer 83 and the second electrode pattern layer 86, and the first substrate layer 84 is bonded to the upper substrate 81 through the bonding layer 82. The first electrode pattern layer 83 and the second electrode pattern layer 86 are electrically connected to the signal processing circuit 85 through conductive wires (not shown). The position of the signal processing circuit 85 is not limited, and it may be disposed under, over, or on one side of the second base material layer 87.

Referring to fig. 16, the first electrode pattern layer 83 includes a plurality of parallel first direction touch driving electrodes 871, a non-touch area 874 is disposed between the plurality of first direction touch driving electrodes 871, and a pressure detecting electrode 861 is disposed in the non-touch area 874. The second electrode pattern layer 86 has a plurality of parallel second direction touch receiving electrodes (not numbered) on the upper or lower surface thereof. The layered arrangement of the first direction touch driving electrode 871 and the second direction touch receiving electrode can avoid the problem that the circuit is easy to break caused by overlapping between the touch electrodes.

The second electrode pattern layer 86 may also be disposed on the lower surface of the first substrate layer 84, or the first electrode pattern layer 83 may be disposed directly on the upper substrate 81, and the second electrode pattern layer 86 is disposed on the first substrate layer 84, so that the disposition of the second substrate layer 87 may be reduced, and the touch assembly 80 with pressure detection may be made thinner.

Referring to fig. 17, a touch assembly 90 with pressure detection according to a ninth embodiment of the present invention is provided, and the touch assembly 90 with pressure detection is different from the touch assembly 10 with pressure detection according to the first embodiment only in that: in this embodiment, the touch assembly 90 with pressure detection is additionally provided with a second pressure layer 96, and the touch assembly 90 with pressure detection includes, from top to bottom, an upper substrate 91, a bonding layer 92, an electrode pattern layer 93, a first substrate layer 94, a second pressure layer 96, a second substrate layer 97 and a signal processing circuit 95, wherein at least one pressure detection electrode (not numbered) on the electrode pattern layer 93 forms a first pressure layer (not numbered), and in this embodiment, the second pressure layer 96 is additionally provided, so that the pressing force value can be detected more precisely by superposition of the pressure layer detection results of the two layers.

Referring to fig. 18, 2 sets of touch electrodes and pressure detection electrodes are used as an example to illustrate the touch scan pulse and the pressure scan pulse output by the driving pulse processor (not shown), where vt_1 and vt_2 are respectively touch scan pulses received by the first direction touch driving electrode 1 and the first direction touch driving electrode 2, vf_1 and vf_2 are respectively pressure scan pulses received by the pressure detection electrode 1 and the pressure detection electrode 2 on the first pressure layer, vf_a and vf_b are respectively pressure scan pulses received by the pressure detection electrode a and the pressure detection electrode b on the second pressure layer 96, and scan pulse signals between the touch electrodes and the first pressure layer and the second pressure layer 96 are preferably time-sequentially alternated, and one pressure scan pulse or touch scan pulse may also include a plurality of short pulses. More preferably, one or more of the scan pulses in the touch electrode and the first and second pressure layers 96 are narrowed so as to avoid the potential switching points of each other when time-sharing is performed, so that the anti-interference performance between signals can be further improved.

Referring to fig. 19, a tenth embodiment of the present invention provides a touch assembly (not numbered) with pressure detection, which is different from the touch assembly 90 with pressure detection of the eighth embodiment only in that: the touch electrode and the first pressure layer and the second pressure layer are performed at the same time sequence, the pulse width of the touch scanning pulse received by the touch electrode is larger than that of the pressure scanning pulse received by the first pressure layer, the pulse width of the pressure scanning pulse received by the first pressure layer is larger than that of the pressure scanning pulse received by the second pressure layer, and potential switching points between the touch electrode and the pressure scanning pulses between the first pressure layer and between the touch electrode and the second pressure layer are staggered, so that interference between signals is reduced. In practice, the pulse width of the pressure scanning pulse between the touch electrode and the first pressure layer and the pulse width between the touch electrode and the second pressure layer are not limited, so long as the potential switching points of the pressure scanning pulse between the touch electrode and the first pressure layer and the pulse width between the touch electrode and the second pressure layer are ensured to be staggered, and the timing diagrams of the touch electrode and the pulse width of the pressure scanning pulse between the touch electrode and the first pressure layer and the pulse width of the pressure scanning pulse between the touch electrode and the pulse width of the second pressure layer are ensured to be completely consistent.

Referring to fig. 20A, an eleventh embodiment (corresponding to the implementation architecture of fig. 4A) of the present invention provides a driving method of a touch assembly with pressure detection, where the touch assembly with pressure detection may be any one of the touch assemblies with pressure detection mentioned in embodiments one to ten of the present invention (the names of mechanical components and the reference numerals thereof refer to the names of mechanical components and the reference numerals thereof in embodiment one), and the driving method of the touch assembly with pressure detection includes the steps of:

step S0: starting;

step S1: the driver 181 generates a driving signal;

step S2: the step includes S21 and step S22:

step S21: the touch sensor 17 operates; a kind of electronic device with high-pressure air-conditioning system

Step S22: the pressure sensor 16 is operated;

step S3: and (5) ending.

In step S21, the operation of the touch sensor 17 specifically includes:

step S21a: the selection circuit 184 selects a first set of timings from the driving signals to provide the touch sensor 17 with a touch scan pulse;

step S21b: the touch sensor 17 detects a touch position.

The operation of the pressure sensor 16 in step S22 specifically includes:

step S22a: the selection circuit 184 selects a second set of timing outputs from the drive signals to the pulse reforming circuit 185;

Step S22b: the pulse reforming circuit 185 processes the second set of timing signals output by the selection circuit 184 to provide pressure scanning pulses to the pressure sensor, and the manner in which the pulse reforming circuit 185 processes the signals includes one or more of:

(1) The displacement, touch electrode and pressure detection electrode 161 are driven in the same time sequence or time sequence, and optimally, when time sequence is performed, the touch electrode and pressure detection electrode are alternately arranged or a time gap is arranged between the touch scanning pulse and the pressure scanning pulse.

(2) Narrowing the pulse width shortens the pulse width of the pulse in the time-sequential driving or the simultaneous sequential driving of the touch electrode and the pressure detection electrode 161 to avoid overlapping of the potential switching points between the touch scan pulse and the pressure scan pulse.

(3) Frequency division and other processes; a single pulse is processed into a plurality of short pulses, or a plurality of short pulses are combined into one pulse.

Step S22c: the pressure sensor 17 detects a pressing force value. In this step, the pressure sensor 17 detects the pressing force value by a wheatstone bridge, and an operational amplifier circuit is connected to the output end of the wheatstone bridge. The wheatstone bridge comprises at least four resistors: RFn, RCn (n is a positive integer), ra, rb, RFn are internal resistances corresponding to the different pressure detection electrodes 161, RCn are reference resistances arranged near the RFn, ra and Rb are fixed resistances, and Ra and Rb are selected to form a Wheatstone bridge by a multiplexer through groups of RFn and RCn so as to detect the variation of the RFn electric signal to obtain a pressing force value.

Step S22a and step S22b may be alternatively provided, for example, only the selection circuit 184 is provided, and the selection circuit 184 directly selects a part of the driving signals as the pressure scanning pulses to output to the pressure sensor 16; or only the pulse reforming circuit 185 is provided, the pulse reforming circuit 185 directly shifts the driving signal, narrows the pulse, divides the frequency, and the like, and then provides the pressure scanning pulse for the pressure sensor 16. The touch sensor 17 may also process the driving signal through the selection circuit 184 and/or the pulse reforming circuit 185 and then output the touch scan pulse.

Referring to fig. 20B again, a touch assembly according to a twelfth embodiment of the present invention (corresponding to the implementation architecture shown in fig. 4B) is slightly different from the eleventh embodiment of the present invention, and the driving method of the touch assembly with pressure detection includes the steps of:

step T0: starting;

step T1: the driver 181 generates a driving signal;

step T2: the step includes T21 and step T22:

step T21: the touch sensor 17 operates; a kind of electronic device with high-pressure air-conditioning system

Step T22: the pressure sensor 16 is operated;

step T3: and (5) ending.

The operation of the touch sensor 17 in step T21 specifically includes:

step T21a: the driving signal is transmitted to the touch sensor 17 as a touch scanning pulse; a kind of electronic device with high-pressure air-conditioning system

Step T21b: the touch sensor 17 detects a touch position.

The operation of the pressure sensor 16 in step T22 specifically includes:

step T22a: the selection circuit 184 selects a part of pulses from the driving signal to output to the pulse reforming circuit 185;

step T22b: the pulse reforming circuit 185 processes the output pulse of the selection circuit 184 and outputs the processed output pulse to the pressure sensor 16.

Step T22c: the pressure sensor 17 detects the pressing force value

Compared with the prior art, the driving method of the touch assembly with pressure detection provided by the invention has the advantages that the driving signals are selected and processed, the touch sensor 17 and the pressure sensor 16 can be driven by the same driver 181, so that the driving method is simplified, the hardware cost is saved, and the circuit design is simplified. The driving method disclosed by the invention effectively avoids the interference between electric signals by selecting, shifting, shortening pulse, dividing frequency and other treatments on the driving signals output by the driver 181. The pressure sensor 16 detects the pressure value by using a wheatstone bridge, and has a simple circuit structure and high control precision. Most importantly, the pressure signal processor 19 employs the bridge 191 in combination with the multiplexer 192, and the multiplexer 192 selects the different pressure detecting electrodes 161, but the resistors Ra and Rb are shared resistors in the wheatstone bridge formed by the different pressure detecting electrodes 161 when detecting the pressure signal, so that the number of resistors in the wheatstone bridge can be greatly reduced, and the error rate between the different pressure detecting electrodes 161 is reduced due to the sharing of part of hardware during the pressure detection. Furthermore, the reference resistors RCn are arranged nearby the pressure detection electrodes 161 in a one-to-one correspondence manner, so that the temperature influence among the reference resistors is consistent, other received noise is similar, the stability of the wheatstone bridge is facilitated, the signal misjudgment caused by the temperature drift of the hardware circuit and environmental factors is reduced, the interference caused by other greatly reduced noise is reduced, and the detection precision of the pressure signal is further improved.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, but any modifications, equivalents, improvements, etc. within the principles of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a touch assembly with pressure detects which characterized in that: the touch assembly with the pressure detection comprises a three-dimensional sensor and a three-dimensional controller, wherein the three-dimensional sensor comprises a plurality of touch electrodes and at least one pressure detection electrode, the three-dimensional controller comprises a driver and a driving pulse processor, the driver supplies pressure scanning pulses to the at least one pressure detection electrode under the cooperation of the driving pulse processor, and the touch scanning pulses are supplied to the plurality of touch electrodes; the touch scanning pulse and the pressure scanning pulse are performed at the same time sequence, one working period of the touch scanning pulse and one working period of the pressure scanning pulse are at least partially overlapped, and potential switching points of the touch scanning pulse and the pressure scanning pulse are staggered.

2. The touch assembly with pressure detection of claim 1, wherein: the touch scanning pulse and the pressure scanning pulse are alternately performed in a time sequence, and a gap is formed between adjacent touch scanning pulses and pressure scanning pulses or a time gap is formed between adjacent touch scanning pulses and pressure scanning pulses.

3. The touch assembly with pressure detection of claim 2, wherein: the at least one pressure detection electrode is a plurality of pressure detection electrodes, the touch scanning pulses corresponding to the plurality of touch electrodes are performed in a synchronous sequence, and the potential switching points are staggered, and/or the pressure scanning pulses corresponding to the plurality of pressure detection electrodes are performed in a synchronous sequence, and the potential switching points are staggered.

4. The touch assembly with pressure detection of any of claims 1-3, wherein: one working period of the touch scanning pulse and/or the pressure scanning pulse comprises n short pulses, and n is a positive integer.

5. The touch assembly with pressure detection of claim 1, wherein: the touch scanning pulse frequency is 1-20 times of the pressure scanning pulse frequency.

6. The touch assembly with pressure detection of claim 1, wherein: the driving pulse processor performs one or more of displacement, pulse width narrowing and frequency division on the touch scanning pulse and/or the pressure scanning pulse.

7. The touch assembly with pressure detection of claim 1, wherein: the driving pulse processor comprises a selection circuit and/or a pulse reforming circuit, and the selection circuit, the pulse reforming circuit and the at least one pressure detection electrode are sequentially and electrically connected.

8. The touch assembly with pressure detection of claim 1, wherein: the three-dimensional controller further comprises a touch signal receiving module, a pressure signal receiving module and an integrated processor, wherein the touch electrodes are electrically connected with the touch signal receiving module, the pressure detecting electrodes are electrically connected with the pressure signal receiving module, and the touch signal receiving module and the pressure signal receiving module are electrically connected with the integrated processor.

9. The touch assembly with pressure detection of claim 1, wherein: the at least one pressure detection electrode is a plurality of pressure detection electrodes, the internal resistances of the pressure detection electrodes are RF 0, RF 1 and RF 2 are respectively corresponding to each other, a resistor RC 0, RC 1, RC2 and RC n which are matched with each other are arranged nearby the pressure detection electrodes, RF 1, RF 2 and RF n are mutually reference resistors, the touch control assembly with the pressure detection electrodes further comprises a pressure signal processor, the pressure signal processor comprises a resistor Ra, a resistor Rb, the multiplexer M1 is connected with the input end of the multiplexer MUX 2, RF 0, RF 1 and RF 2 are connected with the multiplexer MUX 1, and RC 0, RC 1, RC 2 and RC 2 are mutually referenced to each other, the pressure signal processor is connected with the multiplexer Ra 2 and the RF 2, the multiplexer Ra 2 is connected with the input end of the multiplexer MUX 1, and the RF 2 is respectively, and the pressure signal processor is matched with the RF input end of the multiplexer R1 and the multiplexer RF 2, and the RF signal processor is connected with the output end of the multiplexer Ra 2, and the multiplexer is respectively connected with the RF 2, and the multiplexer is connected with the output end of the multiplexer Ra 2 and the multiplexer R2 is respectively.

10. The touch assembly with pressure detection of claim 1, wherein: the plurality of touch electrodes and the at least one pressure detection electrode are arranged in the same plane, the plurality of touch electrodes comprise a plurality of first direction touch driving electrodes which are parallel to each other and a plurality of second direction touch receiving electrodes which are parallel to each other, a certain included angle is formed between the first direction touch driving electrodes and the second direction touch receiving electrodes, a non-touch area is arranged between the plurality of first direction touch receiving electrodes, the at least one pressure detection electrode is arranged in the non-touch area, an overlapping area is formed between the at least one pressure detection electrode and the plurality of first direction touch driving electrodes which are parallel to each other and the plurality of second direction touch receiving electrodes which are parallel to each other, and an insulating block is arranged between the plurality of first direction touch driving electrodes which are parallel to each other and the plurality of second direction touch receiving electrodes which are parallel to each other in the overlapping area.

11. The touch assembly with pressure detection of claim 1, wherein: the plurality of touch electrodes and the at least one pressure detection electrode are arranged in the same plane, the plurality of touch electrodes comprise a plurality of first direction touch driving electrodes and a plurality of second direction touch receiving electrodes, no overlapping area exists between the first direction touch driving electrodes and the second direction touch receiving electrodes, a non-touch area is arranged between the plurality of first direction touch driving electrodes or the plurality of second direction touch receiving electrodes or between the plurality of first direction touch driving electrodes and the plurality of second direction touch receiving electrodes, and the at least one pressure detection electrode is arranged in the non-touch area.

12. The touch assembly with pressure detection of claim 1, wherein: the plurality of touch electrodes comprise a plurality of first direction touch driving electrodes which are parallel to each other and a plurality of second direction touch receiving electrodes which are parallel to each other, the plurality of first direction touch electrodes which are parallel to each other and the plurality of second direction touch electrodes which are parallel to each other are positioned on different substrate layers or are arranged in different planes of the same substrate layer, a non-touch area is arranged between the plurality of first direction touch driving electrodes which are parallel to each other, and the at least one pressure detection electrode is arranged in the non-touch area.

13. The touch assembly with pressure detection of claim 1, wherein: the touch assembly with the pressure detection function comprises at least one first pressure layer and one second pressure layer, wherein the first pressure layer and the second pressure layer are provided with at least one pressure detection electrode, and at least the first pressure layer and the touch electrode are located on the same plane.

14. The touch assembly with pressure detection of claim 13, wherein: the pressure scanning pulse received by the pressure detection electrode of the first pressure layer and the pressure scanning pulse received by the pressure detection electrode of the second pressure layer are performed in a time sequence.

15. The touch assembly with pressure detection of claim 14, wherein: the first pressure layer, the second pressure layer and the touch electrodes are respectively connected with the first pressure layer and the second pressure layer, and the pressure scanning pulse and/or the touch scanning pulse received by two or three of the plurality of touch electrodes are carried out at the same time sequence and the respective potential switching points are staggered.

16. A driving method of a touch control assembly with pressure detection is characterized in that: the touch assembly with pressure detection comprises a three-dimensional sensor and a three-dimensional controller, wherein the three-dimensional sensor comprises a plurality of touch electrodes and at least one pressure detection electrode, the three-dimensional controller comprises a driver and a driving pulse processor, and the method comprises the following steps:

the driver provides a pressure scanning pulse for the at least one pressure detection electrode under the cooperation of the driving pulse processor; a kind of electronic device with high-pressure air-conditioning system

The driver provides touch scanning pulses for the plurality of touch electrodes;

the driving pulse processor performs one or more operations of displacement, narrowing pulse and frequency division on an input signal, and potential switching points between the pressure scanning pulse and the touch scanning pulse are not overlapped.

17. The method of claim 16, wherein the step of driving the touch assembly with pressure detection comprises: the pressure scanning pulse and the touch scanning pulse are performed in a time sequence or a simultaneous time sequence.