Touch screen passive trigger device

Abstract

The present invention discloses a touch screen passive trigger device. The device includes: a touch screen drive electrode signal detection circuit, a trigger electrode correspondingly connected to a receiving electrode of the touch screen, a microprocessor module, a control button, a signal processing module and an analog switch module; the touch screen drive electrode signal detection circuit is provided with a plurality of detection circuit electrodes correspondingly connected to the drive electrodes of the touch screen; the control button is electrically connected to the microprocessor module; the analog switch module is electrically connected to the signal processing module, the trigger electrode and the microprocessor module respectively; the signal processing module is also electrically connected to the touch screen drive electrode signal detection circuit. The purpose of operating the touch screen without touching the touch screen with a finger is achieved, thereby realizing the technical effect of being able to conveniently operate the touch screen in some scenarios where it is inconvenient to use the touch screen or the touch screen cannot be touched, but the touch screen needs to be controlled.

Description

Technical Field

[0001] The present application relates to the technical field of touch screen control, and in particular to a touch screen passive triggering device. Background Art

[0002] Projected capacitive touch screen has the function of multi-finger touch, and has the advantages of high light transmittance, fast response speed and long life.

[0003] The projected capacitive screen is composed of a driving electrode and a receiving electrode. The driving electrode sends a low-voltage touch screen's own driving electrode signal to the receiving electrode to form a stable current. When the human body touches the capacitive screen, the human body is equivalent to a large conductor, and the finger and the capacitive screen form an equivalent capacitor. The position where the finger touches increases the capacitance value of the touch point due to the superposition of the human body's equivalent capacitance. The touch screen's own driving electrode signal can flow into the receiving electrode and the human body through this equivalent capacitance. In this way, the touch screen's own driving electrode signal received by the receiving electrode increases due to the increase in capacitance. The signal processing circuit can determine the touched point by calculating the signal strength received by the receiving electrode.

[0004] ITO is used to make horizontal and vertical electrode arrays on the glass surface. These horizontal and vertical electrodes constitute capacitors, which are usually called self-capacitance. When a finger touches the capacitive screen, the capacitance of the finger will be superimposed on the capacitance of the screen, increasing the capacitance of the screen.

[0005] Although touch screens greatly facilitate users' daily operations on various smart terminals, there are still some situations where it is inconvenient to use a touch screen, or the touch screen cannot be used to achieve good operation, or the touch screen cannot be touched, but the touch screen needs to be controlled. For example: hospitals, factory industrial control, mobile phone game controllers, etc.

[0006] With regard to the problem in the related art of how to make the touch screen produce the same control effect as when the finger is not touching the touch screen, no effective solution has been proposed yet. Summary of the invention

[0007] The main purpose of the present application is to provide a touch screen passive trigger device that can perform touch screen operations without touching the touch screen with a finger, so as to solve the problems existing in the related art.

[0008] In order to achieve the above objective, according to one aspect of the present application, a touch screen passive triggering device is provided.

[0009] The touch screen passive triggering device according to the present application includes:

[0010] A touch screen driving electrode signal detection circuit, a trigger electrode correspondingly connected to a receiving electrode of the touch screen, a microprocessor module, a control button, a signal processing module and an analog switch module;

[0011] The touch screen driving electrode signal detection circuit is provided with a plurality of detection circuit electrodes for correspondingly connecting to the driving electrodes of the touch screen;

[0012] The control button is electrically connected to the microprocessor module, and is used to trigger a corresponding trigger point on the touch screen by pressing the control button;

[0013] The analog switch module is electrically connected to the signal processing module, the trigger electrode and the microprocessor module respectively; the signal processing module is also electrically connected to the touch screen drive electrode signal detection circuit; and is used to turn on the detection circuit electrode corresponding to the trigger point through the signal processing module and the trigger electrode according to the conduction instruction of the microprocessor module and maintain it for a certain period of time, and complete the touch operation.

[0014] Further, as in the aforementioned touch screen passive triggering device, the signal processing module comprises: a signal amplifying circuit and a boosting circuit connected to each other;

[0015] The signal amplifying circuit is also electrically connected to the touch screen driving electrode signal detecting circuit and the analog switch module, and is used to amplify the signal detected by the touch screen driving electrode signal detecting circuit.

[0016] Furthermore, the aforementioned touch screen passive triggering device further includes: a power supply module; the power supply module is electrically connected to the signal processing module, the microprocessor module and the analog switch module, and provides power.

[0017] Further, as in the aforementioned touch screen passive triggering device, the power module includes: a power management circuit and a battery;

[0018] The power management circuit is electrically connected to the battery, the boost circuit, the analog switch module and the microprocessor module respectively.

[0019] Furthermore, as in the aforementioned touch screen passive triggering device, the battery is a rechargeable lithium battery.

[0020] Further, as in the aforementioned touch screen passive triggering device, the power module further includes: a lithium battery protection circuit and a lithium battery charging management circuit;

[0021] The lithium battery protection circuit and the lithium battery charging management circuit are both electrically connected to the battery.

[0022] Further, as in the aforementioned touch screen passive triggering device, the touch screen driving electrode signal detection circuit and the triggering electrode are arranged on the surface of the touch screen.

[0023] Further, as in the aforementioned touch screen passive trigger device, the touch screen drive electrode signal detection circuit and the trigger electrode are respectively one of an FPC soft circuit board, transparent glass with a conductive coating, or a transparent film with a conductive coating.

[0024] Further, as in the aforementioned touch screen passive triggering device, the boost circuit is a processing module that can amplify the voltage of the power module to a voltage of plus or minus 10V or a voltage of plus or minus 20V.

[0025] Furthermore, as in the aforementioned touch screen passive triggering device, the central processor adopts a microprocessor of model HT32F52331.

[0026] In the embodiment of the present application, a touch screen passive trigger device is adopted, by setting: a touch screen driving electrode signal detection circuit, a trigger electrode correspondingly connected to the receiving electrode of the touch screen, a microprocessor module, a control button, a signal processing module and an analog switch module; the touch screen driving electrode signal detection circuit is provided with a plurality of detection circuit electrodes correspondingly connected to the driving electrodes of the touch screen; the control button is electrically connected to the microprocessor module, and is used to trigger the corresponding trigger point on the touch screen by pressing the control button; the analog switch module is electrically connected to the signal processing module, the trigger electrode and the microprocessor module respectively; the signal processing module is also electrically connected to the touch screen driving electrode signal detection circuit; and is used to conduct the detection circuit electrode corresponding to the trigger point through the signal processing module and the trigger electrode according to the conduction instruction of the microprocessor module and maintain it for a certain period of time, and complete the touch operation. The purpose of touch screen operation can be achieved without touching the touch screen with fingers, thereby achieving the technical effect of being able to conveniently perform touch screen operation in some situations such as hospitals, factory industrial control, mobile phone game controllers, etc., where it is inconvenient to use the touch screen or the touch screen cannot be touched, but the touch screen needs to be controlled, thereby solving the technical problems existing in the relevant technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0028] Figure 1 is a schematic diagram of functional module connections of a device according to an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the circuit structure of a central processing unit according to an embodiment of the present application;

[0030] Figure 3 is a circuit structure diagram of a power management circuit according to an embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of the circuit structure of a detection electrode, a signal amplification circuit, a digitally controlled analog switch and a detection electrode according to an embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the circuit structure of a detection electrode, a signal amplification circuit, a digitally controlled analog switch and a detection electrode according to an embodiment of the present application;

[0033] Figure 6 is a schematic diagram of the circuit structure of a key part according to an embodiment of the present application;

[0034] Figure 7 is a schematic diagram of a circuit structure of an LED indicator light according to an embodiment of the present application; and

[0035] Figure 8 Schematic diagram of the circuit structure of a joystick according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] like Figure 1As shown, a touch screen passive trigger device is provided, comprising: a touch screen driving electrode signal detection circuit 1, a trigger electrode 2 for correspondingly connecting to a receiving electrode of the touch screen (wherein the trigger electrode 2 and the receiving electrode can be arranged in a one-to-many or a many-to-one arrangement), a microprocessor module 3, a control button 4, a signal processing module and an analog switch module 5; the touch screen driving electrode signal detection circuit 1 is provided with a plurality of detection circuit electrodes for correspondingly connecting to the driving electrodes of the touch screen (that is, a plurality of detection circuit electrodes are provided on one touch screen driving electrode signal detection circuit 1, and the monitoring circuit electrode can be arranged in a one-to-many or a many-to-one arrangement between the trigger electrode 2 and the receiving electrode). It is set in 1 to many, or many to 1); the control button 4 is electrically connected to the microprocessor module 3, and is used to trigger the corresponding trigger point on the touch screen by pressing the control button 4; the analog switch module 5 is electrically connected to the signal processing module, the touch screen drive electrode signal detection circuit 1, the trigger electrode 2 and the microprocessor module 3 respectively, and the signal processing module is also electrically connected to the touch screen drive electrode signal detection circuit 1; it is used to turn on the detection circuit electrode corresponding to the trigger point through the signal processing module and the trigger electrode according to the conduction instruction of the microprocessor module 3 and maintain it for a certain period of time, and complete the touch operation. Specifically, when turned on, the touch screen's own drive electrode signal detected by the detection circuit electrode will be amplified by the signal processing module, and the amplified touch screen's own drive electrode signal will be transmitted to the trigger electrode 2, and when the screen scans to the current position, the analog touch operation can be identified. Preferably, the analog switch module 5 is a digitally controlled analog switch ( Figure 4 HC4051 in the ).

[0043] Specifically, the correspondence between different control buttons 4 and specific areas on the touch screen (i.e., the touch screen drive electrode signal detection circuit 1 and the trigger electrode 2 of the corresponding touch area) is pre-set; when the user presses the control button 4, the microprocessor module 3 controls the analog switch module 5 to be turned on. Since the control analog switch module 5 has been connected to the detection electrode and the trigger electrode corresponding to the specific area in advance, the detection electrode and the trigger electrode are turned on through the signal amplification circuit and maintained for a certain period of time. When the screen scans to the current position, since the high-frequency signal on the trigger electrode is a strong signal after amplification, even when the human body does not touch the touch screen and the surface capacitance does not change, the signal strength received on the receiving electrode inside the touch screen will also become stronger, that is, it will be judged that the current position is pressed by the finger. At the same time, the purpose of the microprocessor triggering the touch screen without detecting the touch screen drive electrode signal is achieved, so the speed requirement of the microprocessor module 3 used is very low, and the circuit is simple, easy to achieve mass production and low failure rate.

[0044] The purpose of performing touch screen operations without touching the touch screen with fingers is achieved, thereby realizing the technical effect of being able to conveniently perform touch screen operations in scenarios where it is inconvenient to use the touch screen or cannot be touched, but the touch screen needs to be controlled, such as in hospitals, factory industrial control, mobile phone game controllers, etc.

[0045] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, such as the aforementioned touch screen passive trigger device, the signal processing module includes: a signal amplification circuit 6 and a boost circuit 7 connected to each other;

[0046] The boost circuit 7 is also electrically connected to the power module;

[0047] The signal amplifying circuit 6 is also electrically connected to the touch screen driving electrode signal detecting circuit 1 and the analog switch module 5 , and is used to amplify the signal detected by the touch screen driving electrode signal detecting circuit 1 .

[0048] The signal amplifying circuit 6 is connected to the boosting circuit 7 so that the signal can boost and amplify the touch screen's own driving electrode signal according to the boosting function of the boosting circuit 6; and then the amplified touch screen's own driving electrode signal can be transmitted to the receiving electrode of a specific touch screen, thereby enabling the screen to detect and trigger the pressing action of the area corresponding to the control button 4 in the touch screen.

[0049] Preferably, it further comprises a second analog switch module; the second analog switch module is electrically connected to the touch screen drive electrode signal detection circuit 1;

[0050] The second analog switch module can select which detection circuit electrode to open, and the analog switch module can select which trigger electrode to open. The second analog switch module is a chip that works at a low voltage of 3.3V and is modeled as HC4051; the analog switch module 5 is a chip that works at ±10V and is modeled as CD40151.

[0051] In some embodiments, the aforementioned touch screen passive trigger device further includes: a power module; specifically, the power module is used to provide power for system operation and supply voltage signals to the signal processing module;

[0052] The power supply module is electrically connected to the signal processing module, the microprocessor module 3 and the analog switch module 5, and supplies power. Generally, the power supply module uses a 3.3V regulated power supply to supply power to the system including the microprocessor module 3;

[0053] like Figure 1As shown, in some embodiments, such as the aforementioned touch screen passive triggering device, the power module includes: a power management circuit 8 and a battery 9;

[0054] The power management circuit 8 is electrically connected to the battery 9, the boost circuit 7, the analog switch module 5 and the microprocessor module 3 respectively.

[0055] Specifically, Figure 3 As shown, the power management circuit 8 is used to provide 3.3V operating voltage to each functional module in the device, and when the battery 9 is a rechargeable battery, it also includes a charging indicator light function.

[0056] In some embodiments, the battery 9 is a rechargeable lithium battery. Using a rechargeable lithium battery can effectively reduce battery waste, save energy, and reduce waste.

[0057] In some embodiments, as in the aforementioned touch screen passive trigger device, the power module further includes: a lithium battery protection circuit 10 and a lithium battery charging management circuit 11;

[0058] The lithium battery protection circuit 10 and the lithium battery charging management circuit 11 are both electrically connected to the battery 9 .

[0059] And preferably, a circuit structure diagram of a lithium battery protection circuit 10 and a lithium battery charging management circuit 11 is as shown Figure 5 As shown, the lithium battery charging management circuit 11 preferably adopts a USB TYPE C interface.

[0060] In some embodiments, as in the aforementioned touch screen passive trigger device, the touch screen drive electrode signal detection circuit 1 and the trigger electrode 2 are disposed on the surface of the touch screen. Preferably, the touch screen drive electrode signal detection circuit 1 and the trigger electrode 2 are disposed at the edge of the touch screen surface, thereby reducing the obstruction and influence on the display content of the touch screen.

[0061] In some embodiments, as in the aforementioned touch screen passive trigger device, the touch screen drive electrode signal detection circuit 1 and the trigger electrode 2 are respectively one of an FPC soft circuit board, a transparent glass with a conductive coating, or a transparent film with a conductive coating. The touch screen drive electrode signal detection circuit 1 and the trigger electrode 2 made of the above materials can have good transparency and triggering effect.

[0062] In some embodiments, such as the aforementioned touch screen passive trigger device, the boost circuit 7 is a processing module that can amplify the voltage of the power module to a voltage of plus or minus 10 V or plus or minus 20 V. High voltage is beneficial to improve the trigger sensitivity and triggering when a protective film is attached to the screen.

[0063] In some embodiments, such as the aforementioned touch screen passive trigger device, the microprocessor module 3 uses a microprocessor of model HT32F52331. This type of microprocessor has the characteristics of strong processing capability, low power consumption, long service life, and stable operation, which can effectively improve the service life and operation processing capability of the overall device.

[0064] Preferably, Figure 7 As shown, a corresponding LED indicator light is also provided, so that the user can be intuitively prompted to the corresponding device operation status; at the same time, the present application also provides a circuit structure diagram of the button part and a circuit structure diagram of the joystick, respectively as shown in Figure 6 and Figure 8 As shown,

[0065] Obviously, those skilled in the art should understand that the control function in the present invention described above only involves the processing of instructions or electrical signals, and does not involve specific software and data processing.

[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A touch screen passive trigger device, characterized in that: include: A touch screen driving electrode signal detection circuit (1), a trigger electrode (2) correspondingly connected to a receiving electrode of the touch screen, a microprocessor module (3), a control button (4), a signal processing module and an analog switch module (5); The touch screen driving electrode signal detection circuit (1) is provided with a plurality of detection circuit electrodes for correspondingly connecting to the driving electrodes of the touch screen; The control button (4) is electrically connected to the microprocessor module (3) and is used to trigger a corresponding trigger point on the touch screen by pressing the control button (4); The analog switch module (5) is electrically connected to the signal processing module, the trigger electrode (2) and the microprocessor module (3) respectively, and the signal processing module is also electrically connected to the touch screen drive electrode signal detection circuit (1); it is used to connect the detection circuit electrode corresponding to the trigger point through the signal processing module and the trigger electrode according to the conduction instruction of the microprocessor module (3) and maintain it for a certain period of time, and complete the touch operation; The signal processing module comprises: a signal amplification circuit (6) and a voltage boost circuit (7) connected to each other; The signal amplifying circuit (6) is also electrically connected to the touch screen drive electrode signal detecting circuit (1) and the analog switch module (5), and is used to amplify the signal detected by the touch screen drive electrode signal detecting circuit (1); It also includes: a power supply module; the power supply module is electrically connected to the signal processing module, the microprocessor module (3) and the analog switch module (5), and supplies power; The power module comprises: a power management circuit (8) and a battery (9); The power management circuit (8) is electrically connected to the battery (9), the boost circuit (7), the analog switch module (5) and the microprocessor module (3) respectively; the battery (9) is a rechargeable lithium battery; and the power module further comprises: a lithium battery protection circuit (10) and a lithium battery charging management circuit (11); The lithium battery protection circuit (10) and the lithium battery charging management circuit (11) are both electrically connected to the battery (9); the touch screen drive electrode signal detection circuit (1) and the trigger electrode (2) are arranged on the surface of the touch screen; the touch screen drive electrode signal detection circuit (1) and the trigger electrode (2) are respectively one of an FPC soft circuit board, transparent glass with a conductive coating, or a transparent film with a conductive coating; the boost circuit (7) is a processing module capable of amplifying the voltage of the power module to a voltage of positive or negative 10V or a voltage of positive 20V; and the microprocessor module (3) uses a microprocessor of model HT32F52331.

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