CN110908536A - Anti-interference method of capacitive touch screen and control module thereof - Google Patents

Anti-interference method of capacitive touch screen and control module thereof Download PDF

Info

Publication number
CN110908536A
CN110908536A CN201911088282.4A CN201911088282A CN110908536A CN 110908536 A CN110908536 A CN 110908536A CN 201911088282 A CN201911088282 A CN 201911088282A CN 110908536 A CN110908536 A CN 110908536A
Authority
CN
China
Prior art keywords
interference
module
touch screen
capacitive touch
power supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911088282.4A
Other languages
Chinese (zh)
Inventor
王志昴
周威
龙建平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Weiguan Vision Technology Co Ltd
Original Assignee
Shenzhen Weiguan Vision Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Weiguan Vision Technology Co Ltd filed Critical Shenzhen Weiguan Vision Technology Co Ltd
Priority to CN201911088282.4A priority Critical patent/CN110908536A/en
Publication of CN110908536A publication Critical patent/CN110908536A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The invention discloses an anti-interference method of a capacitive touch screen and a control module thereof, wherein the anti-interference method comprises the following modules: the capacitive touch screen comprises a capacitive touch screen, a touch control panel, an anti-interference module, an android mainboard or a computer mainboard, a USB data communication detection circuit module, a power switch power supply management module, a main chip E2354, a DC 5V power supply circuit and an EMI anti-interference peripheral circuit, wherein an EMI anti-interference magnetic ring with the inner diameter specification of 3.5-13mm is sleeved on a USB connecting wire between the anti-interference module and the touch control panel, and the capacitive touch screen relates to the technical field of touch control. According to the anti-interference method and the control module of the capacitive touch screen, the anti-interference module and the anti-interference device are added in the prior art, the change of the production process of the existing standard capacitive touch screen products is not influenced, the upgrading change can be quickly introduced into the original equipment, the electromagnetic interference is filtered on hardware in real time, the touch data communication is not influenced by the electromagnetic interference, the high-frequency interference is reduced, and the radiation is shielded.

Description

Anti-interference method of capacitive touch screen and control module thereof
Technical Field
The invention relates to the technical field of touch control, in particular to an anti-interference method of a capacitive touch screen and a control module thereof.
Background
Capacitive touch screens have been widely used in a variety of industries based on their good touch interaction and appearance. The capacitive touch screen is also gradually introduced as a display terminal of a plurality of devices in the current new retail industry. Because the electromagnetic environment used by the new retail equipment is complex, the capacitive touch screen is particularly easy to be interfered by the space radiation of the capacitive touch screen or other equipment, the user experience is seriously influenced, and the following defects are brought if the electromagnetic interference problem cannot be well solved. (1) The operation experience is influenced, phenomena such as touch drift and the like are easy to occur, and false touch is generated; (2) the individual difference is large, and the popularization consistency is poor; (3) affecting the normal use of the whole machine product. In order to better improve the anti-interference capability of the capacitive touch screen, an anti-interference module and an anti-interference device are added in the prior art, so that the change of the production process of the current standard capacitive touch screen products is not influenced, and the upgrading change can be quickly introduced into the original equipment.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an anti-interference method of a capacitive touch screen and a control module thereof, and solves the problems that operation experience is influenced, touch drift is easy to occur, the popularization consistency is poor, and the normal use of the whole machine is influenced.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an anti-interference control module of a capacitive touch screen comprises the following modules:
capacitive touch screen: the capacitive touch screen technology works by using current induction of a human body. The capacitive touch screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are respectively coated with a layer of ITO, the outermost layer is a thin silica glass protective layer, the ITO coating of the interlayer is used as a working surface, four electrodes are led out from four corners, and the ITO in the inner layer is used as a shielding layer to ensure a good working environment;
touch control panel: when a finger of a user approaches the touch pad, the capacitance is changed, the capacitance change amount is detected by the control IC of the touch pad and is converted into coordinates, and the touch pad learns the finger movement condition by capacitance induction;
an anti-interference module: the power supply device comprises a USB data communication detection circuit module, a power switch power supply management module, a main chip E2354, an EMI anti-interference peripheral circuit and a DC 5V power supply circuit;
android main board: the main board module is used for prefabricating an android system;
computer mainboard: the main board module is used for prefabricating the desktop system;
USB data communication detection circuitry module: the circuit module is used for detecting USB data and is used as a circuit module for detecting USB data communication when the main equipment finds that the equipment is inserted;
the power supply management module of the power switch: the module is mainly responsible for identifying the amplitude of the power supply of the CPU, generating corresponding short moment waves and pushing a rear-stage circuit to output power;
main chip E2354: the chip module is used for controlling;
DC 5V power supply circuit: supplying power by a direct current 5V power supply;
EMI anti-interference peripheral circuit: adopting an EMIEMI coupling path to perform anti-interference work;
preferably, an EMI anti-interference magnetic ring with the inner diameter of 3.5-13mm is sleeved on the USB connecting wire between the anti-interference module and the touch control panel.
Preferably, the android main board or the computer main board is connected with the anti-interference module through a USB (universal serial bus) line, the anti-interference module is connected with the touch control panel through an FPC (flexible printed circuit) line, and the anti-interference module is connected with the capacitive touch screen through an FPC line.
Preferably, the USB data communication detection circuit module in the anti-interference module is connected with the power switch power supply management module, the main chip E2354 in the anti-interference module is respectively connected with the USB data communication detection circuit module and the power switch power supply management module, the DC 5V power supply circuit is respectively connected with the main chip E2354 and the power switch power supply management module, and the EMI anti-interference peripheral circuit in the anti-interference module sends data to the main chip E2354.
Preferably, the EMI anti-interference peripheral circuit inside the anti-interference module receives data from an android mainboard or a computer mainboard through a USB.
An anti-interference method of a capacitive touch screen is characterized in that data of an android main board or a computer main board are sent to an anti-interference module through a USB data line, an EMI anti-interference peripheral circuit in the anti-interference module is used for receiving the data transmitted by the USB data line, the data EMI anti-interference peripheral circuit enters a main chip E2354, the main chip E2354 controls a USB data communication detection circuit module and a power switch power supply management module respectively through received data signals, the USB data communication detection circuit module sends the data to the touch control board through the USB data line, the power switch power supply management module outputs a direct current 5V power supply to the touch control board according to control signals received by the main chip E2354, and the capacitive touch screen receives the control signals from the touch control board through FPC line connection.
Preferably, the capacitive touch screen detects the current working condition of the touch screen in real time, and if no communication between the touch screen and the main board is detected within a time value set by the main control chip, for example, within 5 hours, the touch screen is considered to be in a false dead state at present, and at this time, the touch screen needs to be automatically powered off, restarted and reset.
Preferably, the main control chip sets a USB interface for forcibly restarting the initialization touch screen at 5 o' clock every morning, so that the touch panel cannot be used in a high power consumption state all the time, and the service life of the control chip is prolonged.
Preferably, an EMI anti-interference magnetic ring with the inner diameter of 3.5-13mm is additionally sleeved on a USB connecting wire between the anti-interference module and the touch control panel, so that the distortion of signal transmission is reduced, the high-frequency interference is reduced, and the radiation is shielded.
(III) advantageous effects
The invention provides an anti-interference method of a capacitive touch screen and a control module thereof. The method has the following beneficial effects:
the capacitive touch screen anti-interference method and the control module thereof have the advantages that the anti-interference module and the anti-interference device are added in the prior art, the change of the production process of the existing standard capacitive touch screen products is not influenced, and the upgrading change can be quickly introduced into the original equipment.
The anti-interference method of the capacitive touch screen and the control module thereof filter electromagnetic interference on hardware in real time, ensure that touch data communication is not influenced by the electromagnetic interference, the main control chip sets a USB interface for forcibly restarting and initializing the touch screen at 5 o' clock every morning, ensure that the touch panel cannot work in a high power consumption state all the time, prolong the service life of the control chip, install an EMI anti-interference magnetic ring, reduce distortion of signal transmission, reduce high-frequency interference and shield radiation, thereby further ensuring the stability of touch data transmission and improving the anti-interference capability of the capacitive touch screen.
Drawings
FIG. 1 is a schematic structural diagram of the overall working principle of the present invention;
FIG. 2 is a schematic diagram of the components of the interference rejection module of the present invention;
FIG. 3 is a schematic view of the installation of the EMI anti-interference magnetic ring of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: an anti-interference control module of a capacitive touch screen comprises the following modules:
capacitive touch screen: the capacitive touch screen technology works by using current induction of a human body. The capacitive touch screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are respectively coated with a layer of ITO, the outermost layer is a thin silica glass protective layer, the ITO coating of the interlayer is used as a working surface, four electrodes are led out from four corners, and the ITO in the inner layer is used as a shielding layer to ensure a good working environment;
touch control panel: when a finger of a user approaches the touch pad, the capacitance is changed, the capacitance change amount is detected by the control IC of the touch pad and is converted into coordinates, and the touch pad learns the finger movement condition by capacitance induction;
an anti-interference module: the power supply device comprises a USB data communication detection circuit module, a power switch power supply management module, a main chip E2354, an EMI anti-interference peripheral circuit and a DC 5V power supply circuit;
android main board: the main board module is used for prefabricating an android system;
computer mainboard: the main board module is used for prefabricating the desktop system;
USB data communication detection circuitry module: the circuit module is used for detecting USB data and is used as a circuit module for detecting USB data communication when the main equipment finds that the equipment is inserted;
the power supply management module of the power switch: the module is mainly responsible for identifying the amplitude of the power supply of the CPU, generating corresponding short moment waves and pushing a rear-stage circuit to output power;
main chip E2354: the chip module is used for controlling;
DC 5V power supply circuit: supplying power by a direct current 5V power supply;
EMI anti-interference peripheral circuit: adopting an EMIEMI coupling path to perform anti-interference work;
an EMI anti-interference magnetic ring with the inner diameter of 3.5-13mm is sleeved on a USB connecting wire between the anti-interference module and the touch control panel.
Android mainboard or computer motherboard pass through the USB line and are connected with anti-interference module, and anti-interference module passes through the FPC line to be connected with touch control panel, and anti-interference module passes through the FPC line to be connected with capacitive touch screen.
The USB data communication detection circuit module in the anti-interference module is connected with the power switch power supply management module, the main chip E2354 in the anti-interference module is connected with the USB data communication detection circuit module and the power switch power supply management module respectively, the DC 5V power supply circuit is connected with the main chip E2354 and the power switch power supply management module respectively, and the EMI anti-interference peripheral circuit in the anti-interference module sends data to the main chip E2354.
And an EMI anti-interference peripheral circuit inside the anti-interference module receives data from an android mainboard or a computer mainboard through a USB.
An anti-interference method of a capacitive touch screen is characterized in that data of an android main board or a computer main board are sent to an anti-interference module through a USB data line, an EMI anti-interference peripheral circuit inside the anti-interference module is used for receiving data transmitted by the USB data line, the data enter a main chip E2354 after the EMI anti-interference peripheral circuit, the main chip E2354 controls a USB data communication detection circuit module and a power switch power supply management module respectively through received data signals, the USB data communication detection circuit module sends the data to the touch control board through the USB data line, the power switch power supply management module outputs a direct current 5V power supply to the touch control board according to control signals received by the main chip E2354, and the capacitive touch screen receives the control signals from the touch control board through FPC line connection.
The capacitive touch screen detects the current working condition of the touch screen in real time, if no communication between the touch screen and the mainboard is detected within a time value set by the main control chip, for example, within 5 hours, the touch screen is considered to be in a false dead state at present, and at the moment, the touch screen needs to be automatically subjected to power-off restarting reset operation.
The main control chip sets a USB interface for forcibly restarting the initialization touch screen at 5 o' clock every morning, so that the touch panel cannot work in a high-power-consumption state all the time to be used, and the service life of the control chip is prolonged.
An EMI anti-interference magnetic ring with the inner diameter of 3.5-13mm is additionally sleeved on a USB connecting wire between the anti-interference module and the touch control panel, so that the distortion of signal transmission is reduced, the high-frequency interference is reduced, and the radiation is shielded.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides an anti-interference control module of capacitive touch screen which characterized in that: the system comprises the following modules:
capacitive touch screen: the capacitive touch screen technology works by using current induction of a human body. The capacitive touch screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are respectively coated with a layer of ITO, the outermost layer is a thin silica glass protective layer, the ITO coating of the interlayer is used as a working surface, four electrodes are led out from four corners, and the ITO in the inner layer is used as a shielding layer to ensure a good working environment;
touch control panel: when a finger of a user approaches the touch pad, the capacitance is changed, the capacitance change amount is detected by the control IC of the touch pad and is converted into coordinates, and the touch pad learns the finger movement condition by capacitance induction;
an anti-interference module: the power supply device comprises a USB data communication detection circuit module, a power switch power supply management module, a main chip E2354, an EMI anti-interference peripheral circuit and a DC 5V power supply circuit;
android main board: the main board module is used for prefabricating an android system;
computer mainboard: the main board module is used for prefabricating the desktop system;
USB data communication detection circuitry module: the circuit module is used for detecting USB data and is used as a circuit module for detecting USB data communication when the main equipment finds that the equipment is inserted;
the power supply management module of the power switch: the module is mainly responsible for identifying the amplitude of the power supply of the CPU, generating corresponding short moment waves and pushing a rear-stage circuit to output power;
main chip E2354: the chip module is used for controlling;
DC 5V power supply circuit: supplying power by a direct current 5V power supply;
EMI anti-interference peripheral circuit: adopting an EMIEMI coupling path to perform anti-interference work;
2. the capacitive touch screen interference rejection control module according to claim 1, wherein: an EMI anti-interference magnetic ring with the inner diameter of 3.5-13mm is sleeved on the USB connecting wire between the anti-interference module and the touch control panel.
3. The capacitive touch screen interference rejection control module according to claim 1, wherein: the android main board or the computer main board is connected with the anti-interference module through a USB line, the anti-interference module is connected with the touch control panel through an FPC line, and the anti-interference module is connected with the capacitive touch screen through an FPC line.
4. The capacitive touch screen interference rejection control module according to claim 1, wherein: the USB data communication detection circuit module in the anti-interference module is connected with the power switch power supply management module, the main chip E2354 in the anti-interference module is connected with the USB data communication detection circuit module and the power switch power supply management module respectively, the DC 5V power supply circuit is connected with the main chip E2354 and the power switch power supply management module respectively, and the EMI anti-interference peripheral circuit in the anti-interference module sends data to the main chip E2354.
5. The anti-interference method and control module for capacitive touch screen according to claim 1, wherein: and an EMI anti-interference peripheral circuit inside the anti-interference module receives data from an android mainboard or a computer mainboard through a USB.
6. An anti-interference method of a capacitive touch screen is characterized in that: the data of android mainboard or computer mainboard send anti-interference module through the USB data line, the inside anti-interference peripheral circuit of EMI of anti-interference module is used for receiving the data that the USB data line transmitted, data EMI gets into main chip E2354 behind the anti-interference peripheral circuit, main chip E2354 controls USB data communication detection circuit module and switch power supply management module respectively through received data signal, USB data communication detection circuit module sends data to touch control panel through the USB data line, switch power supply management module exports DC 5V power to touch control panel according to the control signal who receives main chip E2354, capacitive touch screen receives the control signal from touch control panel through FPC line connection.
7. The anti-interference method and control module for capacitive touch screen according to claim 6, wherein: the capacitive touch screen detects the current working condition of the touch screen in real time, if no communication between the touch screen and the mainboard is detected within a time value set by the main control chip, for example, within 5 hours, the touch screen is considered to be in a false dead state at present, and at the moment, the touch screen needs to be automatically subjected to power-off restarting reset operation.
8. The anti-interference method and control module for capacitive touch screen according to claim 6, wherein: the main control chip sets a USB interface for forcibly restarting the initialization touch screen at 5 o' clock every morning, so that the touch panel can not work in a high-power consumption state all the time to use, and the service life of the control chip is prolonged.
9. The anti-interference method and control module for capacitive touch screen according to claim 6, wherein: an EMI anti-interference magnetic ring with the inner diameter of 3.5-13mm is additionally sleeved on a USB connecting wire between the anti-interference module and the touch control panel, so that the distortion of signal transmission is reduced, the high-frequency interference is reduced, and the radiation is shielded.
CN201911088282.4A 2019-11-08 2019-11-08 Anti-interference method of capacitive touch screen and control module thereof Pending CN110908536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911088282.4A CN110908536A (en) 2019-11-08 2019-11-08 Anti-interference method of capacitive touch screen and control module thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911088282.4A CN110908536A (en) 2019-11-08 2019-11-08 Anti-interference method of capacitive touch screen and control module thereof

Publications (1)

Publication Number Publication Date
CN110908536A true CN110908536A (en) 2020-03-24

Family

ID=69817081

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911088282.4A Pending CN110908536A (en) 2019-11-08 2019-11-08 Anti-interference method of capacitive touch screen and control module thereof

Country Status (1)

Country Link
CN (1) CN110908536A (en)

Similar Documents

Publication Publication Date Title
CN107908353A (en) Electronic system, touch-control processing unit and its method
CN204117569U (en) A kind of Industry Control mainboard with anti-interference interface
CN102156584B (en) Touch screen terminal and method for solving deadlock of touch screen
JP2021002376A (en) Modulating reference voltage to perform capacitive sensing
WO2018214379A1 (en) Smart tablet with capacitive touch screen
KR20150028762A (en) Gesturing Arcitecture Using Proximity Sensing
CN103245864A (en) Touch screen testing system and method
CN103946916B (en) For the CRT light pen interface of flat-panel monitor
CN102708034A (en) Computer remote and local monitoring system based on CPU (central processing unit) with serial port function
US20150212616A1 (en) Touch panel and touch detecting method therefor
CN106354312B (en) Touch screen and display screen integrated test system based On-Cell
CN211742068U (en) Anti-interference control module of capacitive touch screen
CN110908536A (en) Anti-interference method of capacitive touch screen and control module thereof
CN101847056B (en) Touch panel with shared output pins and method thereof
CN108415609B (en) Touch screen, touch detection method and wearable device
CN209168079U (en) A kind of touch display unit and electronic whiteboard
CN101630217B (en) Transparent hand-written touch screen of electromagnetic induction type
CN206819220U (en) Intelligent flat plate of capacitive screen
CN203276219U (en) Touch screen testing system
CN203894745U (en) Interface control circuit and related input system
CN102455816A (en) Panel system having proximity sensing function
CN207925106U (en) Touch screen and display screen based on In-Cell integrate burning testing system
CN203117963U (en) Debugging system and device for providing graphical pin interface
CN209028592U (en) Notebook computer touch pad with electronic paper display
CN202710685U (en) Capacitive screen integration testing circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination