CN211742068U - Anti-interference control module of capacitive touch screen - Google Patents
Anti-interference control module of capacitive touch screen Download PDFInfo
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- CN211742068U CN211742068U CN201921922160.6U CN201921922160U CN211742068U CN 211742068 U CN211742068 U CN 211742068U CN 201921922160 U CN201921922160 U CN 201921922160U CN 211742068 U CN211742068 U CN 211742068U
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Abstract
The utility model discloses a capacitive touch screen's anti-interference control module, including following module: capacitive touch screen, touch control board, anti-interference module, tall and erect mainboard of ann or computer mainboard, USB data communication detection circuit module, switch power supply management module, main chip E2354, DC 5V power supply circuit, the anti-interference peripheral circuit of EMI, the cover is equipped with the anti-interference magnetic ring of EMI that an inside diameter specification is 3.5-13mm on the USB connecting wire between anti-interference module and the touch control board, the utility model relates to a touch control technical field. 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
Technical Field
The utility model relates to a touch control technical field specifically is an anti-interference control module of capacitive touch screen.
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.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides an anti interference control module of capacitive touch screen has solved and has influenced the operation and experience, the uniformity that appears touch-control drift, popularization easily is poor, influence the problem of complete machine normal use.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: an anti-interference control module of a capacitive touch screen comprises the following modules:
capacitive touch screen: the capacitive touch screen technology works by utilizing 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 an ITO (indium tin oxide), the outermost layer is a thin silica glass protective layer, the interlayer ITO coating is used as a working surface, four electrodes are led out from four corners, and the inner ITO 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 used for managing power supply of a power supply, and is a chip which plays roles in converting, distributing, detecting and managing electric energy in an electronic equipment system and is mainly responsible for identifying the power supply amplitude of a CPU (central processing unit), 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: the coupling path of the EMIEMI is adopted for 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.
Preferably, the data of the android mainboard or the computer mainboard are sent to the anti-interference module through the USB data line, the internal EMI anti-interference peripheral circuit of the anti-interference module is used for receiving the data transmitted by the USB data line, the internal EMI anti-interference peripheral circuit of the anti-interference module sends the data to the main chip E2354, the main chip E2354 controls the USB data communication detection circuit module and the power switch power supply management module through the received data signals respectively, the USB data communication detection circuit module sends the data to the touch control panel through the USB data line, the power switch power supply management module outputs the DC 5V power to the touch control panel according to the control signals received by the main chip E2354, and the capacitive touch screen receives the control signals from the touch control panel 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 subjected to power-off restart reset operation.
Preferably, the main chip E2354 sets a forced restart of the USB interface of the initialization touch screen every morning at 5 o' clock, so as to ensure that the touch pad cannot be used in a high power consumption state all the time, thereby prolonging the service life of the chip.
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 utility model provides an anti-interference control module of capacitive touch screen. The method has the following beneficial effects:
the anti-interference control module of the capacitive touch screen is additionally provided with the anti-interference module and the anti-interference device in the prior art, so that 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.
(II), this capacitive touch screen's anti-interference control module, filter electromagnetic interference in real time on the hardware, ensure that touch data communication can not receive the influence because of electromagnetic interference, main chip E2354 sets for 5 o ' clock in the morning every day and forces to restart the USB interface of initializing the touch-sensitive screen, ensure that the touch-sensitive board can not work all the time and use under high power consumption state, the life of extension chip, the anti-interference magnetic ring of installation EMI, reduce signal transmission's distortion, reduce high frequency interference, shielding radiation, thereby further ensure touch-sensitive data transmission's stability and promote capacitive touch screen's self interference killing feature.
Drawings
FIG. 1 is a schematic structural view of the overall working principle of the present invention;
FIG. 2 is a schematic diagram of the anti-jamming module components of the present invention;
fig. 3 is a schematic diagram 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 described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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 utilizing 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 an ITO (indium tin oxide), the outermost layer is a thin silica glass protective layer, the interlayer ITO coating is used as a working surface, four electrodes are led out from four corners, and the inner ITO 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 used for managing power supply of a power supply, and is a chip which plays roles in converting, distributing, detecting and managing electric energy in an electronic equipment system and is mainly responsible for identifying the power supply amplitude of a CPU (central processing unit), 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: the coupling path of the EMIEMI is adopted for 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.
Data of an android mainboard or a computer mainboard 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, an EMI anti-interference peripheral circuit inside the anti-interference module sends the data to a main chip E2354, the main chip E2354 controls a USB data communication detection circuit module and a power switch power supply management module through received data signals respectively, the USB data communication detection circuit module sends the data to a touch control panel through the USB data line, the power switch power supply management module outputs a direct current 5V power supply to the touch control panel according to a control signal received by the main chip E2354, and the capacitive touch screen receives the control signal from the touch control panel through FPC (flexible printed circuit) 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 chip E2354 sets a USB interface for forcibly restarting the initialization touch screen at 5 o' clock every morning, so that the touch pad can not be used in a high power consumption state all the time, and the service life of the 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 utilizing 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 an ITO (indium tin oxide), the outermost layer is a thin silica glass protective layer, the interlayer ITO coating is used as a working surface, four electrodes are led out from four corners, and the inner ITO 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 used for managing power supply of a power supply, and is a chip which plays roles in converting, distributing, detecting and managing electric energy in an electronic equipment system and is mainly responsible for identifying the power supply amplitude of a CPU (central processing unit), 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: the coupling path of the EMIEMI is adopted for 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 capacitive touch screen interference rejection control module 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. The capacitive touch screen interference rejection control module according to claim 1, wherein: the data of android mainboard or computer mainboard send anti-interference module through the USB data line, the anti-interference peripheral circuit of the inside EMI of anti-interference module is used for receiving the data that the USB data line transmitted, the anti-interference peripheral circuit of the inside EMI of anti-interference module sends data to main chip E2354, 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 the direct current 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 capacitive touch screen interference rejection control module 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 capacitive touch screen interference rejection control module according to claim 6, wherein: the main chip E2354 sets a USB interface for forcibly restarting the initialization touch screen at 5 o' clock every morning, so that the touch pad can not be used in a high power consumption state all the time, and the service life of the chip is prolonged.
9. The capacitive touch screen interference rejection control module 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921922160.6U CN211742068U (en) | 2019-11-08 | 2019-11-08 | Anti-interference control module of capacitive touch screen |
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| CN201921922160.6U CN211742068U (en) | 2019-11-08 | 2019-11-08 | Anti-interference control module of capacitive touch screen |
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| CN211742068U true CN211742068U (en) | 2020-10-23 |
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