CN113168259B - Touch device, electronic equipment and touch interaction system - Google Patents
Touch device, electronic equipment and touch interaction system Download PDFInfo
- Publication number
- CN113168259B CN113168259B CN201980003955.3A CN201980003955A CN113168259B CN 113168259 B CN113168259 B CN 113168259B CN 201980003955 A CN201980003955 A CN 201980003955A CN 113168259 B CN113168259 B CN 113168259B
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- touch
- uplink signal
- chip
- switch
- power supply
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
A touch device, an electronic apparatus and a touch interaction system, wherein the touch device (100) comprises a bootstrap circuit (110), an uplink signal generating circuit (120), a synchronous trigger circuit (130) and a touch chip (140). The touch chip (140) is used for generating a first uplink signal with a first amplitude, and the first uplink signal takes the potential of the grounding end of the touch chip (140) as a reference potential. The synchronous trigger circuit (130) is configured to trigger the uplink signal generating circuit (120) to generate a second uplink signal with a second amplitude, the frequency spectrum and the phase of which are the same as those of the first uplink signal, when the touch chip (140) generates the first uplink signal, and transmit the second uplink signal to a ground terminal of the touch chip (140), where the second uplink signal uses a system ground of a host system as a reference potential. The bootstrap circuit (110) is used for stabilizing the voltage between the grounding end of the touch chip (140) and the power supply end of the touch chip (140). The touch device (100) can improve the amplitude of an uplink signal sent by the touch master device to the touch slave device.
Description
Technical Field
The present disclosure relates to the field of touch control, and more particularly, to a touch control device, an electronic apparatus, and a touch control interaction system.
Background
Currently, in the field of touch equipment interaction, bidirectional communication can be realized between a touch master device and a touch slave device through uplink signals and downlink signals. The signal sent by the touch control master device to the touch control slave device is called an uplink signal, and the signal sent by the touch control slave device to the touch control master device is called a downlink signal. In the touch control main equipment, an uplink signal is generated by a touch control chip. Because the uplink signal transmitted by the touch control chip is limited in amplitude due to the limitations of chip design, process procedure and the like, the sensitivity and anti-interference characteristic of the touch control slave device for receiving the uplink signal are poor, so how to improve the sensitivity and anti-interference characteristic of the touch control slave device for receiving the uplink signal is a problem which is worthy of being solved.
Disclosure of Invention
The embodiment of the application provides a touch device, electronic equipment and a touch interaction system. The touch device, the electronic equipment and the touch interaction system can solve the problems.
An embodiment of the present application provides a touch device in a first aspect. The touch device is connected with the host system. The touch device comprises a bootstrap circuit, an uplink signal generating circuit, a synchronous trigger circuit and a touch chip. The touch chip is used for generating a first uplink signal with a first amplitude, and the first uplink signal takes the potential of the grounding end of the touch chip as a reference potential. The synchronous trigger circuit is used for triggering the uplink signal generating circuit to generate a second uplink signal with the same frequency spectrum and phase as the first uplink signal and transmitting the second uplink signal to the grounding end of the touch chip when the touch chip generates the first uplink signal, and the second uplink signal takes the system ground of the host system as a reference potential. The bootstrap circuit is used for stabilizing the voltage between the grounding end of the touch control chip and the power supply end of the touch control chip.
Therefore, the first uplink signal takes the grounding end of the touch chip as a reference potential, and the second uplink signal takes the system ground of the host system as a reference potential, so that the amplitude of the uplink signal sent by the touch master device to the touch slave device is the sum of the overlapped amplitudes of the first uplink signal and the second uplink signal, the purpose of enhancing the amplitude of the uplink signal is achieved, and the sensitivity and the anti-interference performance of the uplink signal received by the touch slave device are improved.
Optionally, referring to fig. 2, the bootstrap circuit includes a first switch, a second switch, a third switch, and a first capacitor. One end of the first switch is connected to a power supply voltage source of the host system, and the other end of the first switch is connected to a power supply end of the touch chip. One end of the second switch is connected to the uplink signal generating circuit, and the other end of the second switch is connected to the grounding end of the touch chip. One end of the third switch is connected to the system ground of the host system, and the other end of the third switch is connected to the grounding end of the touch chip. One end of the first capacitor is connected to the power supply end of the touch chip, and the other end of the first capacitor is connected to the grounding end of the touch chip.
When the touch control main equipment does not send an uplink signal to the touch control auxiliary equipment, the first switch and the third switch are closed, the second switch is opened, and at the moment, the voltage between the power supply end of the touch control chip and the grounding end of the touch control chip is equal to the power supply voltage of the host system. Meanwhile, the host system charges the first capacitor, and the charging voltage is equal to the power supply voltage of the host system. After charging, the voltage at two ends of the first capacitor is equal to the power supply voltage of the host system.
When the touch control main equipment transmits an uplink signal to the touch control auxiliary equipment, the first switch and the third switch are opened, the second switch is closed, the first capacitor supplies power to the touch control chip, the voltage at two ends of the first capacitor is the power supply voltage of the host system, and therefore the power supply voltage of the touch control chip is equal to the power supply voltage of the host system.
Optionally, in an embodiment of the present application, the touch device includes a communication circuit. The communication circuit is used for improving the reliability of communication between the touch chip and the host system.
The embodiment of the application also provides electronic equipment, which comprises the touch device in the various embodiments of the application, wherein the amplitude of the uplink signal sent by the electronic equipment is equal to the sum of the amplitudes of the first uplink signal and the second uplink signal.
The embodiment of the application also provides a touch interaction system which comprises the electronic equipment and the corresponding touch slave equipment.
Optionally, in the touch interaction system, the touch slave device may be an active pen.
Optionally, in the touch interaction system, a communication protocol between the electronic device and the touch slave device may be USI protocol.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic structural diagram of a touch device according to the present application;
FIG. 2 is one implementation of a bootstrap circuit according to the present application;
FIG. 3 is one implementation of a touch interaction system according to the present application.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of the present application provides a touch device in a first aspect. The touch device is connected with the host system and used for enhancing the amplitude of an uplink signal sent by the touch master device to the touch slave device. The host system is a circuit comprising a main control chip, and the function of the host system comprises the function of providing power supply voltage for the touch control chip for communication with the touch control chip. Referring to fig. 1, the touch device 100 includes a bootstrap circuit 110, an uplink signal generating circuit 120, a synchronous triggering circuit 130 and a touch chip 140. The touch chip is used for generating a first uplink signal with a first amplitude, and the first uplink signal takes the potential of the grounding end of the touch chip as a reference potential. The synchronous trigger circuit is used for triggering the uplink signal generating circuit to generate a second uplink signal with the same frequency spectrum and phase as the first uplink signal and transmitting the second uplink signal to the grounding end of the touch chip when the touch chip generates the first uplink signal, and the second uplink signal takes the system ground of the host system as a reference potential. The bootstrap circuit is used for stabilizing the voltage between the grounding end of the touch control chip and the power supply end of the touch control chip.
The first uplink signal takes the grounding end of the touch chip as a reference potential, and the second uplink signal takes the system ground of the host system as a reference potential, so that the amplitude of the uplink signal sent by the touch master device to the touch slave device is the sum of the amplitudes of the first uplink signal and the second uplink signal, and the purpose of enhancing the amplitude of the uplink signal is achieved.
When the touch control main equipment transmits an uplink signal, the grounding end of the touch control chip is connected to the uplink signal generating circuit, so that the potential difference between the grounding end of the touch control chip and the system ground of the host system is changed, and the bootstrap circuit is required to stabilize the voltage between the grounding end of the touch control chip and the power supply end of the touch control chip.
In a first embodiment of the present application, a specific implementation of a bootstrap circuit is presented. Referring to fig. 2, the bootstrap circuit 10 includes a first switch 101, a second switch 102, a third switch 103, and a first capacitor 104. One end of the first switch is connected to a power supply voltage source of the host system, and the other end of the first switch is connected to a power supply end of the touch chip. One end of the second switch is connected to the uplink signal generating circuit, and the other end of the second switch is connected to the grounding end of the touch chip. One end of the third switch is connected to the system ground of the host system, and the other end of the third switch is connected with the grounding end of the touch chip. One end of the first capacitor is connected to the power supply end of the touch chip, and the other end of the first capacitor is connected to the grounding end of the touch chip.
The communication between the touch control master device and the touch control slave device is divided into two stages, wherein the first stage is that the touch control master device does not send an uplink signal to the touch control slave device, the second stage is that the touch control master device sends the uplink signal to the touch control slave device, and the two stages are executed alternately.
When the touch control master device is in the first stage, the touch control slave device is not sent with an uplink signal, the first switch and the third switch are closed, the second switch is opened, a power supply voltage source (AVDD) of the host system is directly connected to a power supply end of the touch control chip, a system Ground (GND) of the host system is connected with a grounding end of the touch control chip, and a voltage between the power supply end of the touch control chip and the grounding end of the touch control chip is equal to a voltage between the power supply voltage source (AVDD) of the host system and the system Ground (GND) of the host system, namely, the power supply voltage of the touch control chip is equal to the power supply voltage of the host system. Meanwhile, the power supply voltage of the host system charges the first capacitor, and the charging voltage of the first capacitor is equal to the power supply voltage of the host system.
And when the touch control main equipment is in the second stage, the touch control main equipment transmits an uplink signal to the touch control auxiliary equipment, and the touch control chip generates a first uplink signal. The first switch and the third switch are opened, the second switch is closed, and the first capacitor supplies power to the touch chip. The voltage stored at the two ends of the first capacitor is stored by charging the first capacitor by the power supply voltage of the host system in the first stage, so that the voltage at the two ends of the first capacitor is the power supply voltage of the host system, and therefore, the power supply voltage of the first capacitor provided for the touch chip is equal to the power supply voltage of the host system, that is, the power supply voltage of the touch chip in the second stage is equal to the power supply voltage of the host system. The power supply voltage of the touch chip in the first stage is equal to the power supply voltage of the host system, so that the power supply voltages of the touch chip in the first stage and the second stage are equal to the power supply voltage of the host system, and the power supply voltage of the touch chip is stable and unchanged.
When in the second stage, the uplink signal generating circuit is connected to the ground terminal of the touch chip, so that the potential of the ground terminal of the touch chip relative to the system Ground (GND) of the host system is unstable, but since the voltage at the two ends of the first capacitor is fixed, the voltage between the power supply terminal of the touch chip and the ground terminal of the touch chip is also kept unchanged, that is, the power supply voltage of the touch chip is kept unchanged, and therefore, the bootstrap circuit example of the embodiment of the present application can provide stable power supply voltage for the touch chip.
It should be noted that, when in the second stage, the first capacitor forms a loop when supplying power to the touch chip, resulting in a loss of charge, so that the voltage across the first capacitor decreases, but as long as the first capacitor is selected as a capacitor with a large capacity, the voltage across the first capacitor does not decrease significantly, so it can be considered that the voltage remains unchanged.
Optionally, in an embodiment of the present application, the touch device further includes a communication circuit. The communication circuit is used for improving the communication reliability of the host system and the touch chip. As can be seen from the foregoing, when the touch master device sends an uplink signal to the touch slave device, the uplink signal generating circuit generates a second uplink signal, and the second uplink signal is transmitted to the ground terminal of the touch chip, so that the potential of the ground terminal of the touch chip is unstable with respect to the system Ground (GND) of the host system, while the voltage between the power supply terminal of the touch chip and the ground terminal of the touch chip remains unchanged, and therefore the potential difference of the power supply terminal of the touch chip with respect to the system Ground (GND) of the host system also becomes unstable. It can be known that when the touch master device transmits an uplink signal to the touch slave device, the touch chip and the host system cannot directly communicate, so that a communication circuit is required to ensure normal communication between the host system and the touch chip, and communication reliability is improved.
The embodiment of the application also provides electronic equipment, which comprises the touch device in the various embodiments of the application, wherein the amplitude of the uplink signal sent by the electronic equipment is equal to the sum of the amplitudes of the first uplink signal and the second uplink signal.
The embodiment of the application also provides a touch interaction system which comprises the electronic equipment and the corresponding touch slave equipment.
Optionally, in the touch interaction system, the touch slave device may be an active pen. Referring to fig. 3, an active pen touch system is shown. The active pen touch system comprises a host system 21 and a touch device 22, wherein the touch device comprises a synchronous trigger circuit 210, a bootstrap circuit 220, an uplink signal generating circuit 230 and a touch chip 240, and the connection relationship among the circuits is shown in the figure. When the touch control main equipment sends an uplink signal to the active pen, the synchronous trigger circuit triggers the uplink signal generating circuit to generate a second uplink signal when the touch control chip generates a first uplink signal, the second uplink signal is transmitted to the grounding end of the touch control chip, and the bootstrap circuit is used for stabilizing the voltage of the power supply end and the grounding end of the touch control chip. Therefore, the amplitude of the uplink signal sent by the touch control main equipment is equal to the sum of the amplitudes of the first uplink signal and the second uplink signal, and the uplink signal is transmitted to the active pen through the touch screen, so that the sensitivity and the anti-interference characteristic of the active pen for receiving the uplink signal are improved.
Optionally, in the touch interaction system, a communication protocol between the electronic device and the touch slave device may be USI protocol.
It should be noted that, the touch chip in the present application may be used to determine a touch position of a touch object, and may send an uplink signal.
It should be noted that, on the premise of no conflict, the embodiments described in the present application and/or the technical features in the embodiments may be arbitrarily combined with each other, and the technical solutions obtained after the combination should also fall into the protection scope of the present application.
It should be understood that the specific examples in the embodiments of the present application are only for helping those skilled in the art to better understand the embodiments of the present application, and not limit the scope of the embodiments of the present application, and those skilled in the art may make various improvements and modifications based on the above embodiments, and these improvements or modifications fall within the protection scope of the present application.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. The touch device is characterized by comprising a bootstrap circuit, an uplink signal generating circuit, a synchronous trigger circuit and a touch chip;
the touch chip is used for generating a first uplink signal with a first amplitude, and the first uplink signal takes the potential of the grounding end of the touch chip as a reference potential;
the synchronous trigger circuit is used for triggering the uplink signal generating circuit to generate a second uplink signal with the same frequency spectrum and phase as the first uplink signal when the touch chip generates the first uplink signal, the uplink signal generating circuit transmits the second uplink signal to the grounding end of the touch chip, and the second uplink signal takes the system ground of a host system as a reference potential;
the bootstrap circuit is used for stabilizing the voltage between the grounding end of the touch control chip and the power supply end of the touch control chip.
2. The touch device of claim 1, wherein the bootstrap circuit comprises a first switch, a second switch, a third switch, and a first capacitor;
one end of the first switch is connected to a power supply voltage source of the host system, and the other end of the first switch is connected to a power supply end of the touch control chip;
one end of the second switch is connected to the uplink signal generating circuit, and the other end of the second switch is connected to the grounding end of the touch chip;
one end of the third switch is connected to the system ground of the host system, and the other end of the third switch is connected to the grounding end of the touch chip;
one end of the first capacitor is connected to the power supply end of the touch chip, and the other end of the first capacitor is connected to the grounding end of the touch chip.
3. The touch device of claim 2, wherein the first switch and the third switch are closed and the second switch is opened when the touch chip is not transmitting an uplink signal.
4. The touch device of claim 3, wherein when the touch chip sends an uplink signal, the first switch and the third switch are opened, and the second switch is closed.
5. The touch device of claim 1, wherein the touch device comprises a communication circuit for improving reliability of communication between the touch chip and the host system.
6. An electronic device, characterized in that the electronic device comprises a touch device according to any one of claims 1 to 5, and that the amplitude of the uplink signal transmitted by the electronic device is equal to the sum of the amplitudes of the first uplink signal and the second uplink signal.
7. A touch interactive system, characterized in that it comprises an electronic device as claimed in claim 6 and a corresponding uplink signal receiving device.
8. The touch interactive system of claim 7, wherein the uplink signal receiving device comprises an active pen.
9. The touch interactive system of claim 8, wherein the communication protocol of the touch interactive system comprises USI protocol.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/120381 WO2021097842A1 (en) | 2019-11-22 | 2019-11-22 | Touch apparatus, electronic device, and touch interactive system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113168259A CN113168259A (en) | 2021-07-23 |
| CN113168259B true CN113168259B (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980003955.3A Active CN113168259B (en) | 2019-11-22 | 2019-11-22 | Touch device, electronic equipment and touch interaction system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113168259B (en) |
| WO (1) | WO2021097842A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106055127A (en) * | 2015-02-25 | 2016-10-26 | 辛纳普蒂克斯公司 | Active pen with bidirectional communication |
| CN108874199A (en) * | 2017-05-08 | 2018-11-23 | 义隆电子股份有限公司 | Embedded touch display device and communication method thereof with active pen |
| CN109407874A (en) * | 2017-08-17 | 2019-03-01 | 义隆电子股份有限公司 | Method for performing touch sensing on touch display device and touch display device |
| CN109416594A (en) * | 2016-07-27 | 2019-03-01 | 株式会社和冠 | Stylus and sensor controller |
| CN209044548U (en) * | 2016-09-30 | 2019-06-28 | 深圳深微创芯科技有限公司 | Electronic equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861651B (en) * | 2016-09-22 | 2021-01-22 | 京东方科技集团股份有限公司 | Touch method, active pen, touch screen and touch display system |
| EP3418942B1 (en) * | 2016-11-21 | 2021-07-28 | Shenzhen Goodix Technology Co., Ltd. | Fingerprint sensor and electronic terminal |
| JP6644200B2 (en) * | 2017-09-15 | 2020-02-12 | 株式会社ワコム | Active pen and sensor controller |
| KR102570350B1 (en) * | 2017-12-05 | 2023-08-24 | 엘지디스플레이 주식회사 | Touch display device, touch system, driving circuit, and driving method |
-
2019
- 2019-11-22 CN CN201980003955.3A patent/CN113168259B/en active Active
- 2019-11-22 WO PCT/CN2019/120381 patent/WO2021097842A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106055127A (en) * | 2015-02-25 | 2016-10-26 | 辛纳普蒂克斯公司 | Active pen with bidirectional communication |
| CN109416594A (en) * | 2016-07-27 | 2019-03-01 | 株式会社和冠 | Stylus and sensor controller |
| CN209044548U (en) * | 2016-09-30 | 2019-06-28 | 深圳深微创芯科技有限公司 | Electronic equipment |
| CN108874199A (en) * | 2017-05-08 | 2018-11-23 | 义隆电子股份有限公司 | Embedded touch display device and communication method thereof with active pen |
| CN109407874A (en) * | 2017-08-17 | 2019-03-01 | 义隆电子股份有限公司 | Method for performing touch sensing on touch display device and touch display device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021097842A1 (en) | 2021-05-27 |
| CN113168259A (en) | 2021-07-23 |
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