CN210155644U - Touch system and driving device thereof - Google Patents
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- CN210155644U CN210155644U CN201921320418.5U CN201921320418U CN210155644U CN 210155644 U CN210155644 U CN 210155644U CN 201921320418 U CN201921320418 U CN 201921320418U CN 210155644 U CN210155644 U CN 210155644U
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Abstract
The utility model discloses a touch system and drive arrangement thereof. The driving device of the touch system comprises: the device comprises a level conversion circuit, an amplifying circuit and a transmission device, wherein the level conversion circuit is used for boosting a voltage square wave driving signal; the amplifying circuit is connected with the level conversion circuit and is used for amplifying a current signal corresponding to the boosted voltage square wave driving signal; and the transmission device is connected with the amplifying circuit and is used for transmitting the amplified current signal to the touch chip through the induction device of the touch system. Through the utility model discloses, the effect of the technical problem who improves touch system's drive efficiency has been reached.
Description
Technical Field
The utility model relates to a touch-control field particularly, relates to a touch-control system and drive arrangement thereof.
Background
At present, a Touch Panel (TP) with a large size is more and more widely used. The large-size TP has high impedance, and the drive channel and the induction capacitance of the induction device are large, so that the drive capability of the touch chip is reduced. In addition, the touch panel has a large size, and requires more driving channels and sensing devices, so that the time required for scanning each touch chip is also prolonged, which causes a slow touch response of the touch panel and a low driving efficiency of the touch system.
Aiming at the problem of low driving efficiency of a touch system in the prior art, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a touch system and a driving apparatus thereof, which solve the technical problem of low driving efficiency of the touch system at least.
In order to achieve the above object, according to one aspect of the present invention, a driving apparatus of a touch system is provided. The driving device of the touch system comprises: the device comprises a level conversion circuit, an amplifying circuit and a transmission device, wherein the level conversion circuit is used for boosting a voltage square wave driving signal; the amplifying circuit is connected with the level conversion circuit and is used for amplifying a current signal corresponding to the boosted voltage square wave driving signal; and the transmission device is connected with the amplifying circuit and is used for transmitting the amplified current signal to the touch chip through the induction device of the touch system.
Optionally, the level shift circuit comprises: and the emitter of the first triode is grounded, and the base of the first triode is connected with a voltage square wave driving signal and is used for increasing the original voltage of the voltage square wave driving signal to a target voltage.
Optionally, the driving device further comprises: and the base electrode of the second triode is connected with the collector electrode of the first triode, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the amplifying circuit and used for converting the first phase of the target voltage into the second phase.
Optionally, the amplifying circuit comprises: a base electrode of the third triode is connected with a collector electrode of the second triode, and the collector electrode of the third triode is connected with a target power supply and used for conducting when the boosted voltage square wave driving signal is at a high level; and the base electrode of the fourth triode is connected with the base electrode of the third triode, the collector electrode of the fourth triode is grounded, and the emitter electrode of the fourth triode is connected with the emitter electrode of the third triode and is used for conducting when the boosted voltage square wave driving signal is at a low level.
Optionally, the driving device further comprises: the first end of the first resistor is connected to a collector electrode of the first triode, and the second end of the first resistor is connected to a target power supply and used for limiting the current of the first triode; and the first end of the second resistor is connected with a target power supply, and the second end of the second resistor is connected with the collector of the second triode and used for limiting the current of the second triode.
Optionally, the transmitting means is connected to the emitter of the third transistor and the emitter of the fourth transistor.
Optionally, the driving device further comprises: the first end of the third resistor is used for inputting a voltage square wave driving signal, and the second end of the third resistor is connected to the base electrode of the first triode and used for dividing the original voltage of the voltage square wave driving signal; and the first end of the fourth resistor is connected to the second end of the third resistor and the base electrode of the first triode, and the second end of the fourth resistor is grounded and used for conducting the first triode.
In order to achieve the above object, according to another aspect of the present invention, a touch system is provided. The touch system includes: the touch control panel is used for outputting a voltage square wave driving signal; touch-sensitive screen is connected with touch control panel, including at least one drive arrangement, wherein, drive arrangement includes the utility model discloses a drive arrangement.
Optionally, the touch screen further comprises: and the sensing devices are respectively connected with the corresponding driving devices and used for inputting the amplified current signals to the touch chip through the sensing capacitors, wherein the sensing capacitors are arranged at the superposition positions of the sensing devices and the driving devices.
Optionally, the touch chip is disposed on the touch control board.
Through the utility model, a level conversion circuit, an amplifying circuit and a transmission device are adopted, wherein the level conversion circuit is used for boosting the voltage square wave driving signal; the amplifying circuit is connected with the level conversion circuit and is used for amplifying a current signal corresponding to the boosted voltage square wave driving signal; and the transmission device is connected with the amplifying circuit and is used for transmitting the amplified current signal to the touch chip through the induction device of the touch system. That is to say, the low voltage of the voltage square wave driving signal of the driving channel is converted into the high voltage, and the current of the driving signal is amplified, so that the signal received by the touch chip is increased, the technical problem of low driving efficiency of the driving channel of the touch system is solved, and the technical effect of improving the driving efficiency of the driving channel of the touch system is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic diagram of a driving device of a touch system according to the present invention;
fig. 2 is a schematic view of another drive arrangement according to the present invention;
fig. 3 is a schematic diagram of a touch system according to the present invention;
fig. 4 is a schematic diagram of another touch system according to the present invention; and
fig. 5 is a schematic diagram of a square wave drive signal according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such system, article, or apparatus.
Example 1
The utility model discloses a touch system's drive arrangement.
Fig. 1 is a schematic diagram of a driving device of a touch system according to the present invention. As shown in fig. 1, the driving apparatus 100 includes: level shift circuit 10, amplifier circuit 20, and transmission device 30.
And the level conversion circuit 10 is used for boosting the voltage square wave driving signal.
In this embodiment, the driving device of the touch system may be a driving channel (TX) of the touch system for determining the driving capability of the touch system. The voltage square wave driving signal is a square wave driving signal input to the touch system, that is, an input driving signal. In this embodiment, the voltage square wave driving signal is input to the level shifter circuit 10, and the level shifter circuit 10 may boost the voltage square wave driving signal, that is, perform level shifting on a lower original voltage of the voltage square wave driving signal to obtain a higher target voltage, where the original voltage may be below 20V, and the target voltage may be set as required, which is not limited herein.
In this embodiment, only the voltage of the input voltage square wave driving signal is changed, and the period, frequency and phase difference of the voltage square wave driving signal are not changed, so that the processing of the touch chip is facilitated.
And an amplifying circuit 20 connected to the level converting circuit 10 for amplifying the current signal corresponding to the boosted voltage square wave driving signal.
In this embodiment, since the driving device and the sensing device (RX) of the touch system have resistors and sensing capacitors, if the driving capability of the boosted voltage square wave driving signal is weak, the driving signal of the touch system may be clipped, which may cause distortion. In order to improve the driving capability of the voltage square wave driving signal, the current signal corresponding to the boosted voltage square wave driving signal is amplified by the amplifying circuit 20, and the amplified current signal is determined as the driving current of the touch system, that is, the driving current of the amplified output signal, so as to improve the driving capability of the driving device.
And the transmission device 30 is connected with the amplifying circuit 20 and is used for transmitting the amplified current signal to the touch chip through the sensing device of the touch system.
In this embodiment, after the current signal corresponding to the boosted voltage square wave driving signal is amplified by the amplifying circuit 20, the transmitting device 30 transmits the amplified current signal to the touch chip of the touch system through the sensing device of the touch system. Optionally, in this embodiment, an inductive capacitor is disposed at a cross point of the driving device and the inductive device, the inductive device receives the amplified current signal transmitted by the driving device through the inductive capacitor, and then sends the amplified current signal to the touch chip, and the touch chip may process the amplified current signal to obtain a touch signal, and may obtain a magnitude of the touch signal and a generated position of the touch signal.
Alternatively, the level shift circuit 10 includes: and the emitter of the first triode is grounded, and the base of the first triode is connected with a voltage square wave driving signal and is used for increasing the original voltage of the voltage square wave driving signal to a target voltage.
In this embodiment, the level shift circuit 10 may raise the original voltage of the input voltage square wave driving signal to a target voltage through a first transistor, where the first transistor may be an NPN-type transistor, an emitter (E) of the NPN-type transistor is grounded to GND, and a base (B) of the NPN-type transistor is connected to the voltage square wave driving signal.
Optionally, the driving device further comprises: and a second triode, the base of which is connected with the collector of the first triode, the emitter of which is grounded, and the collector of which is connected with the amplifying circuit 20, and is used for converting the first phase of the target voltage into the second phase.
In this embodiment, the phase of the boosted voltage square-wave driving signal is different from the phase of the voltage square-wave driving signal before boosting, and the phase of the boosted voltage square-wave driving signal needs to be converted into the same phase as the phase of the voltage square-wave driving signal before boosting, that is, the phase of the converted voltage square-wave driving signal is kept consistent with the phase of the input voltage square-wave driving signal.
Optionally, the driving apparatus of this embodiment may further include a second transistor, a base of which is connected to the collector (C) of the first transistor, an emitter (E) of which is connected to the GND, and a collector of which is connected to the amplifying circuit 20, for converting a first phase of a target voltage of the boosted voltage square wave driving signal into a second phase that is the same as a phase of an original voltage of the voltage square wave driving signal, so as to keep the phase of the converted voltage square wave driving signal consistent with the phase of the input voltage square wave driving signal. That is, only the voltage of the input voltage square wave driving signal is changed, but the phase of the voltage square wave driving signal is not changed, and the period and the frequency of the voltage square wave driving signal can be kept unchanged.
Alternatively, the amplifying circuit 20 includes: a base electrode of the third triode is connected with a collector electrode of the second triode, and the collector electrode of the third triode is connected with a target power supply and used for conducting when the boosted voltage square wave driving signal is at a high level; and the base electrode of the fourth triode is connected with the base electrode of the third triode, the collector electrode of the fourth triode is grounded, and the emitter electrode of the fourth triode is connected with the emitter electrode of the third triode and is used for conducting when the boosted voltage square wave driving signal is at a low level.
In this embodiment, the amplifying circuit 20 may be a complementary push-pull circuit, and includes a third transistor and a fourth transistor, where the third transistor may be an NPN transistor, the fourth transistor may be a PNP transistor, and the third transistor and the fourth transistor are connected to each other, so as to have a push-pull output function. Optionally, the base (B) of the third transistor is connected to the collector (C) of the second transistor, the collector is connected to a target power supply (VCC) for conducting at a high level of the boosted voltage square wave driving signal, and the base (B) of the fourth transistor is connected to the base of the third transistor, the collector of the second transistor, the collector is grounded GND, and the emitter is connected to the emitter of the third transistor for conducting at a low level of the boosted voltage square wave driving signal. The common emitter of the third triode and the fourth triode can be switched on at any time, and only one of the triodes is switched on.
For example, when the boosted voltage square wave driving signal is at a high level, for example, when the boosted voltage square wave driving signal jumps from a low level to a high level, the voltage of the boosted voltage square wave driving signal is 40V, at this time, 40V is input to the base of the third transistor, so that the third transistor is turned on, the voltage of the output driving signal TX' is slightly less than 40V, 40V is input to the base of the fourth transistor, and the emitter is slightly less than 40V, so that the fourth transistor is turned off; when the boosted voltage square wave driving signal is at a low level, for example, when the boosted voltage square wave driving signal jumps from a high level to a low level, the voltage is 0V, at this time, 0V is input to the base of the third triode, 40V is input to the emitter, so that the third triode is turned off, 0V is input to the base of the fourth triode, 40V is input to the emitter, so that the fourth triode is turned on, the voltage of the output driving signal TX' is 0V, and so on. In the process, the output impedance is small, and the current corresponding to the boosted voltage square wave driving signal is amplified, so that the purpose of amplifying the current signal corresponding to the boosted voltage square wave driving signal is achieved, and the driving capability of the driving device is improved.
Optionally, the driving device further comprises: the first end of the first resistor is connected to a collector electrode of the first triode, and the second end of the first resistor is connected to a target power supply and used for limiting the current of the first triode; and the first end of the second resistor is connected with a target power supply, and the second end of the second resistor is connected with the collector of the second triode and used for limiting the current of the second triode.
In this embodiment, the driving apparatus may further include a first resistor, where a first end of the first resistor is connected to a collector of the first triode, and a second end of the first resistor is connected to the target power supply VCC, and may be configured to limit current of the first triode. The second end of the first resistor is also connected with the base electrode of the second triode and can be used for conducting the second triode. The driving device may further include a second resistor, a first end of the second resistor is connected to the target power VCC, and a second end of the second resistor is connected to a collector of the second triode, so as to limit a current to the second triode. The second end of the second resistor is also connected to the base electrodes of the third triode and the fourth triode and is used for conducting the third triode and the fourth triode.
Optionally, in this embodiment, since the boosted voltage square wave driving signal has a higher voltage, the voltages of the first transistor, the second transistor, the third transistor and the fourth transistor are higher than the first voltage square wave driving signalCBOAnd VCEOIs designed to be greater than the target power supply, otherwise the device will burn out. Wherein, VCBOThe base electrode is grounded, the emitter electrode is open to the ground, and the highest voltage resistance between the collector electrode and the base electrode under a specified condition is VCEOThe emitter is grounded, the base is open to the ground, and the highest withstand voltage is achieved between the collector and the emitter under specified conditions.
Optionally, the transmitting means 30 is connected to the emitter of the third transistor and the emitter of the fourth transistor.
In this embodiment, the transmitting device 30 is connected to the emitter of the third triode and the emitter of the fourth triode, and is configured to transmit the amplified current signal to a touch chip of the touch system through an induction device of the touch system, where the touch chip can process the amplified current signal to obtain a touch signal.
Optionally, the driving device further comprises: the first end of the third resistor is used for inputting a voltage square wave driving signal, and the second end of the third resistor is connected to the base electrode of the first triode and used for dividing the original voltage of the voltage square wave driving signal; and the first end of the fourth resistor is connected to the second end of the third resistor and the base electrode of the first triode, and the second end of the fourth resistor is grounded and used for conducting the first triode.
In this embodiment, the driving apparatus further includes a third resistor, and the third resistor may divide the input voltage square wave driving signal, so as to delay the operation time of the first transistor. The fourth resistor is connected to the second end of the third resistor and the base of the first triode through the first end, and the second end of the fourth resistor is grounded to conduct the first triode.
This embodiment may form a module for boosting an N-channel driving signal by the N driving devices described above.
The driving device of the present invention will be described below by way of example.
Fig. 2 is a schematic view of another drive arrangement according to the present invention. As shown in fig. 2, the driving apparatus includes: the circuit comprises a resistor R1, a resistor R2, a transistor Q1, a transistor Q2, a resistor R3, a resistor R4, a transistor Q3 and a transistor Q4.
The resistor R1 may divide the input voltage square wave driving signal TX1, thereby slowing the operation time of the transistor Q1. The resistor R2 is connected to the second terminal of the resistor R1 and the base of the transistor Q1 through the first terminal, and the second terminal is grounded to turn on the transistor Q1.
The transistor Q1 may be an NPN transistor, with an emitter (E) grounded to GND and a base (B) connected to a voltage square wave driving signal.
The base of the triode Q2 is connected with the collector (C) of the triode Q1, the emitter (E) is grounded, and the collector (C) is connected with the base of the triode Q2, for keeping the phase of the converted voltage square wave driving signal consistent with the phase of the input voltage square wave driving signal. That is, only the voltage of the input voltage square wave driving signal is changed, but the phase of the voltage square wave driving signal is not changed, and the period and the frequency of the voltage square wave driving signal can be kept unchanged.
The transistor Q3 and the transistor Q4 form a complementary push-pull circuit, the transistor Q3 may be an NPN-type transistor, and the transistor Q4 may be a PNP-type transistor. The base of the triode Q3 is connected with the collector of the triode Q2, the collector is connected with VCC, and is used for conducting when the boosted voltage square wave driving signal is at high level, the base of the triode Q4 is connected with the base of the triode Q3 and the collector of the triode Q2, the collector is grounded GND, and the emitter is connected with the emitter of the triode Q3, and is used for conducting when the boosted voltage square wave driving signal is at low level. The common emitters of the transistor Q3 and the transistor Q4 can be switched on at any time and only one of the transistors is switched on, and the amplified signal TX 1' is output through the emitters.
The first end of the resistor R3 is connected to the collector of the transistor Q1, and the second end is connected to VCC, which can be used to limit the current of the transistor Q1. The second terminal of the resistor R3 is also connected to the base of the transistor Q2, which can be used to turn on the transistor Q2. The first end of the resistor R4 is connected to VCC, and the second end is connected to the collector of the transistor Q2, for limiting the current of the transistor Q2. The second end of the resistor R4 is also connected to the base of the transistor Q3 and the base of the four-transistor Q4 for conducting the transistor Q3 and the transistor Q4.
In this embodiment, the VCBO and VCEO design values of the transistor Q1, the transistor Q2, the transistor Q3, and the transistor Q4 are greater than VCC due to the higher voltage of the boosted voltage square wave driving signal, otherwise the device will burn.
In the embodiment, the voltage square wave driving signal is boosted through the level conversion circuit, the amplifying circuit is connected with the level conversion circuit to amplify a current signal corresponding to the boosted voltage square wave driving signal, and the transmitting device is connected with the amplifying circuit to transmit the amplified current signal to the touch chip through the sensing device of the touch system. That is to say, the low voltage of the voltage square wave driving signal of the driving channel is converted into the high voltage, and the current of the driving signal is amplified, so that the signal received by the touch chip is increased, the technical problem of low driving efficiency of the driving channel of the touch system is solved, and the technical effect of improving the driving efficiency of the driving channel of the touch system is achieved.
Example 2
The utility model also provides a touch-control system.
Fig. 3 is a schematic diagram of a touch system according to the present invention. As shown in fig. 3, the touch system 300 includes: a touch control panel 30 and a touch screen 40.
And a touch control panel 30 for outputting a voltage square wave driving signal.
In this embodiment, the touch control board 30, that is, the TP control board, may output the voltage square wave driving signal through an output port of the driving signal provided on the touch control board 30.
Optionally, the touch control panel 30 of this embodiment further includes a receiving port for receiving a signal sent by the sensing channel, and a Universal Serial Bus (USB) interface, where the USB interface may be connected to a main controller of the touch system, and the main controller is connected to a display screen of the touch system.
Touch-sensitive screen 40 is connected with touch control panel 30, including at least one drive arrangement, wherein, drive arrangement includes the utility model discloses a drive arrangement for step up voltage square wave drive signal through level conversion circuit, be connected with level conversion circuit through amplifier circuit, amplify the current signal that voltage square wave drive signal after stepping up corresponds, be connected with amplifier circuit through transmission device, come current signal transmission to touch-control chip after will amplifying through touch-control system's induction system.
Alternatively, the touch screen 40 of this embodiment is connected to the touch control board 30 through a flexible circuit board (FPC) and a Flexible Flat Cable (FFC).
Optionally, the touch screen 40 further includes: and the sensing devices are respectively connected with the corresponding driving devices and used for inputting the amplified current signals to the touch control chip through the sensing capacitors, wherein the sensing capacitors are arranged at the superposition positions of the sensing devices and the driving devices, and the touch control chip is arranged on the touch control panel.
In this embodiment, an inductive capacitor is disposed at a cross point between the driving device and the inductive device on the touch screen 40, and the inductive device receives a signal transmitted by the driving device through the inductive capacitor, and then processes the signal through a touch chip on the touch control board, so as to obtain the size and the position of the touch signal.
The touch system of the present invention is illustrated below.
Fig. 4 is a schematic diagram of another touch system according to the present invention. As shown in fig. 4, the touch system includes: the touch control panel comprises a touch control panel 1, a touch screen 2, a main controller 3 and a display screen 4. The touch control panel 1 includes a signal output channel 11, a signal receiving channel 12, a USB interface 13, and a touch chip 14, and the touch screen 2 includes a plurality of driving channels 21 (four driving channels are shown), a plurality of sensing channels 22 (four sensing channels are shown), and corresponding sensing capacitors 23.
The touch control panel 1 of this embodiment is connected to the touch screen 2 via FPC lines and FFC lines, and the touch control panel 1 is connected to the main controller 3. The main controller is connected with the display screen 4.
In this embodiment, the touch control board 1 outputs the square wave driving signals TX (TX 1-TX 4) to the touch screen 2, as shown in fig. 5, wherein fig. 5 is a schematic diagram of a square wave driving signal according to an embodiment of the present invention, and the square wave driving signals TX 1-TX 4 are respectively input from the signal output channels 11 to the corresponding driving channels 21 on the touch screen 2. An induction capacitor 23 is arranged at the intersection of the driving channel 21 and the corresponding induction channel 22 on the touch screen 2, the induction channel 22 receives the signal transmitted by the driving channel 21 through the induction capacitor 23, and then the signal is sent to the touch chip 14 on the touch control panel 1, and the size and the position of the touch signal are obtained through the processing of the touch chip 14.
The touch system of this embodiment converts the low voltage of the voltage square wave driving signal of the driving channel into the high voltage, and amplifies the current of the driving signal, so that the signal received by the touch chip becomes large, and while the driving capability of the driving device is improved, the touch chip can be made to work at a higher frequency without being affected by the capacitance of the touch screen, thereby improving the touch speed of the touch system, improving the scanning frequency of the touch chip, and also improving the signal-to-noise ratio (SNR) of the touch system, thereby improving the anti-interference capability of the touch system, and the TP of the same material can be used on a larger-sized machine, and the same size can use a TP material with higher impedance and lower cost, for example, ITO, nano silver, metal grids and the like are used, thereby achieving the technical effect of improving the driving efficiency of the touch system.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A driving apparatus of a touch system, comprising: a level shift circuit, an amplification circuit, and a transmission device, wherein,
the level conversion circuit is used for boosting the voltage square wave driving signal;
the amplifying circuit is connected with the level conversion circuit and is used for amplifying a current signal corresponding to the boosted voltage square wave driving signal;
the transmission device is connected with the amplifying circuit and used for transmitting the amplified current signal to the touch control chip through an induction device of the touch control system.
2. The driving apparatus according to claim 1, wherein the level shift circuit comprises:
and the emitter of the first triode is grounded, and the base of the first triode is connected with the voltage square wave driving signal and is used for increasing the original voltage of the voltage square wave driving signal to a target voltage.
3. The drive device according to claim 2, further comprising:
and the base electrode of the second triode is connected with the collector electrode of the first triode, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the amplifying circuit and is used for converting the first phase of the target voltage into the second phase.
4. The driving device according to claim 3, wherein the amplifying circuit includes:
a base electrode of the third triode is connected with a collector electrode of the second triode, and the collector electrode of the third triode is connected with a target power supply and used for conducting when the boosted voltage square wave driving signal is at a high level;
and the base electrode of the fourth triode is connected with the base electrode of the third triode, the collector electrode of the fourth triode is grounded, and the emitter electrode of the fourth triode is connected with the emitter electrode of the third triode and is used for conducting when the boosted voltage square wave driving signal is at a low level.
5. The drive device according to claim 4, further comprising:
the first end of the first resistor is connected to the collector electrode of the first triode, and the second end of the first resistor is connected to the target power supply and used for limiting the current of the first triode;
and the first end of the second resistor is connected to the target power supply, and the second end of the second resistor is connected to the collector electrode of the second triode and used for limiting the current of the second triode.
6. The driving apparatus as claimed in claim 4, wherein the transmitting means is connected to the emitter of the third transistor and the emitter of the fourth transistor.
7. The drive device according to claim 2, further comprising:
the first end of the third resistor is connected with the base electrode of the first triode and used for dividing the original voltage of the voltage square wave driving signal;
and the first end of the fourth resistor is connected to the second end of the third resistor and the base electrode of the first triode, and the second end of the fourth resistor is grounded and used for conducting the first triode.
8. A touch system, comprising:
the touch control panel is used for outputting a voltage square wave driving signal;
a touch screen connected with the touch control panel and including at least one driving device, wherein the driving device includes the driving device of any one of claims 1 to 7.
9. The touch system of claim 8, wherein the touch screen further comprises:
and the sensing devices are respectively connected with the corresponding driving devices and used for inputting the amplified current signals to the touch chip through sensing capacitors, wherein the sensing capacitors are arranged at the superposition positions of the sensing devices and the driving devices.
10. The touch system of claim 9, wherein the touch chip is disposed on the touch control board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921320418.5U CN210155644U (en) | 2019-08-14 | 2019-08-14 | Touch system and driving device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921320418.5U CN210155644U (en) | 2019-08-14 | 2019-08-14 | Touch system and driving device thereof |
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| CN210155644U true CN210155644U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921320418.5U Active CN210155644U (en) | 2019-08-14 | 2019-08-14 | Touch system and driving device thereof |
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| CN (1) | CN210155644U (en) |
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2019
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