CN103389847A - Touch control terminal and anti-interference method and system thereof - Google Patents

Abstract

The invention discloses a touch terminal and its anti-interference method and system. The touch terminal includes an anti-interference system, and the anti-interference system includes a capacitance value acquisition module and a first adjustment module. The method includes: S1. If the touch terminal is connected to For USB peripherals, adjust the response threshold value of the capacitive touch screen of the touch terminal to reduce the response sensitivity of the capacitive touch screen; S2, if the touch terminal is separated from the USB peripherals, adjust the response threshold value to a default value , to restore the responsiveness of the capacitive touch screen. After detecting that the USB peripheral is inserted into the touch terminal, the response threshold value of the capacitive touch screen is increased, the sensitivity of the capacitive touch screen is reduced, and the interference problem is solved.

Description

A touch terminal and its anti-interference method and system

technical field

The present invention relates to touch sensing technology, and more specifically, to a touch terminal and an anti-interference method and system thereof. the

Background technique

When an existing touch terminal including a capacitive touch screen is connected to a USB device, the USB device will charge the touch terminal. The switching frequency of the device charged by the control terminal is relatively close to the scanning frequency of the capacitive touch screen. During the charging process, the interference to the capacitive touch screen is relatively large, which will lead to the problem of touch misoperation. The traditional method to solve the interference problem is to change the scanning frequency of the capacitive touch screen to skip the interference frequency. However, there are many types of USB devices on the market. For example, there are many brands of chargers, and the switching frequency of each brand’s chargers is different. This leads to a problem: After solving the interference of one of the chargers, change a charger , due to the different switching frequencies, there may be interference. That is to say, the above-mentioned anti-interference method can avoid the interference frequency of one or more chargers, but cannot avoid the interference frequencies of all chargers, so this method cannot completely solve the problem of the interference of the charger to the capacitive touch screen. the

Contents of the invention

The present invention aims at the above defects of the prior art, and provides a touch terminal and its anti-interference method and system. When the touch terminal is connected to a USB peripheral, the response sensitivity of the capacitive display screen of the touch terminal is reduced, thereby Solve the problem of touch misoperation caused by the interference of the capacitive touch screen when the USB peripheral is charging the touch terminal. the

The technical solution adopted by the present application to solve the technical problem is to provide an anti-jamming method for a capacitive touch screen of a touch terminal, comprising the following steps:

S1. If the touch terminal is connected to the USB peripheral, adjust the response threshold value of the capacitive touch screen of the touch terminal to reduce the response sensitivity of the capacitive touch screen;

S2. If the touch terminal is separated from the USB peripheral, adjust the response threshold value to a default value, so as to restore the response sensitivity of the capacitive touch screen. the

Preferably, the method also includes:

S0, setting multiple intervals for the capacitance value of the capacitive touch screen, and assigning a threshold adjustment value to each interval;

Preferably, step S1 includes the following sub-steps:

S11. If the touch terminal is connected to a USB peripheral, obtain the capacitance value of the capacitive touch screen after the USB peripheral is connected;

S12. Determine the interval to which the capacitance value belongs, and adjust the response threshold value of the capacitive touch screen according to the threshold adjustment value corresponding to the interval, so as to reduce the response sensitivity of the capacitive touch screen. the

Preferably, step S1 also includes the following sub-steps:

S13. At regular time intervals, obtain the capacitance value of the capacitive touch screen after the touch terminal is connected to the USB peripheral, and determine whether the interval of the capacitance value changes, and if so, adjust the capacitance according to the threshold adjustment value corresponding to the current interval of the capacitance value The response threshold of the touch screen. the

An anti-jamming system for capacitive touch screens for touch terminals is provided, including:

The first adjustment unit is used to adjust the response threshold value of the capacitive touch screen of the touch terminal when the touch terminal is connected to the USB peripheral, so as to reduce the response sensitivity of the capacitive touch screen;

The second adjustment unit is configured to adjust the response threshold to a default value when the touch terminal is separated from the USB peripheral, so as to restore the response sensitivity of the capacitive touch screen. the

Preferably, the system also includes:

The setting unit is used to set multiple intervals for the capacitance value of the capacitive touch screen, and assign a threshold adjustment value to each interval;

Preferably, the first adjustment unit includes:

The capacitance value acquisition module is used to obtain the capacitance value of the capacitive touch screen after the USB peripheral is connected to the USB peripheral when the touch terminal is connected to the USB peripheral;

The first adjustment module is used to determine the interval to which the capacitance value obtained by the capacitance value acquisition module belongs, and adjust the response threshold value of the capacitive touch screen according to the threshold adjustment value corresponding to the interval, so as to reduce the response sensitivity of the capacitive touch screen. the

Preferably, the first adjustment unit also includes:

The second adjustment module is used to obtain the capacitance value of the capacitive touch screen after the touch terminal is connected to the USB peripheral at regular time intervals, and judge whether the interval to which the capacitance value belongs changes, and if so, according to the current interval corresponding to the capacitance value The threshold adjustment value adjusts the response threshold of the capacitive touch screen. the

A touch terminal is provided, including the anti-jamming system for a capacitive touch screen of a touch terminal described in any one of the above items. the

The touch terminal and its anti-interference method and system of the present invention have the following beneficial effects: a USB peripheral insertion detection mechanism is added, and when it is detected that a USB peripheral is inserted into the touch terminal, the response threshold value of the capacitive touch screen is improved , thereby reducing the response sensitivity of the capacitive touch screen, thereby solving the problem of USB peripherals interfering with the charger of the touch terminal. It is more accurate and effective for interference positioning, and will not affect the normal use of the capacitive touch screen, and is suitable for various USB peripherals, such as various chargers. the

Description of drawings

Fig. 1 is the flow chart of the first embodiment of the anti-interference method for the capacitive touch screen of the touch terminal of the present invention;

Fig. 2 is the flowchart of the second embodiment of the anti-jamming method for the capacitive touch screen of the touch terminal of the present invention;

Fig. 3 is the functional block diagram of the first embodiment of the anti-jamming system for the capacitive touch screen of the touch terminal of the present invention;

Fig. 4 is the working flowchart of the anti-jamming system for the capacitive touch screen of touch terminal shown in Fig. 3;

FIG. 5 is a functional block diagram of a second embodiment of an anti-jamming system for a capacitive touch screen of a touch terminal according to the present invention. the

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and embodiments. the

The working principle of the capacitive touch screen of the touch terminal is: a register in the controller of the capacitive touch screen stores a response threshold (also called the report threshold), when the finger touches the capacitive touch screen When on the metal layer, due to the electric field of the human body, a coupling capacitance is formed between the finger and the surface of the touch screen. When the capacitance value reaches or exceeds the response threshold value, it will respond to the touch action (that is, report the point), that is, perform the corresponding touch. control operation. the

Fig. 1 is the flow chart of the first embodiment of the anti-jamming method for the capacitive touch screen of the touch terminal of the present invention, as shown in Fig. 1, in this implementation, the method of the present invention comprises the following steps:

S1, if the touch terminal is connected to the USB peripheral, adjust the response threshold value of the capacitive touch screen of the touch terminal to reduce the response sensitivity of the capacitive touch screen;

S2. If the touch terminal is separated from the USB peripheral, adjust the response threshold value to a default value, so as to restore the response sensitivity of the capacitive touch screen. the

In this embodiment, two sets of initialization codes of the controllers of the capacitive touch screen can be built into the software. When the touch terminal is connected to the USB peripheral, the first set of initialization codes can be used to initialize the controller of the capacitive touch screen to reduce the capacitance. The response sensitivity of the touch screen. When the touch terminal is separated from the USB peripheral, the second set of initialization code is used to initialize the controller of the capacitive touch screen again, so as to restore the response sensitivity of the capacitive touch screen to the default value. Wherein, the second set of initialization codes is codes for normally initializing the controller of the capacitive touch screen. the

Specifically, in step S1, it is judged whether there is a USB peripheral connected to the touch terminal, if not, the normal operation of the touch terminal is performed, and if so, the first set of initialization code is used to initialize the response sensitivity of the capacitive touch screen, thereby adjusting the controller The response threshold value stored in the register, the response threshold value is increased from the original default value to a new threshold value, and the response sensitivity of the capacitive touch screen is reduced due to the increase of the response threshold value. In addition, the increased response threshold value should be less than or equal to the maximum capacitance value that can be generated after the finger touches the screen, otherwise, the capacitive touch screen touch will be invalid. the

In step S2, it is judged whether the touch terminal is separated from the connected USB peripheral, if not, the response sensitivity of the current capacitive touch screen is maintained, and if so, the second set of initialization code is used to initialize the controller of the capacitive touch screen, and the controller's The response threshold value stored in the register is restored to the default value, thereby restoring the response sensitivity of the capacitive touch screen. the

In this embodiment, different codes are used to initialize the controller of the capacitive touch screen, and different parameters are written into registers in the controller to realize setting different response thresholds, thereby changing the response sensitivity of the capacitive touch screen. After detecting that the USB peripheral is inserted into the touch terminal, the response threshold value of the capacitive touch screen is increased, and the sensitivity of the capacitive touch screen is reduced, regardless of the switching frequency of the connected USB peripheral (which can be regarded as a charger), Can achieve anti-interference very well. the

Fig. 2 is a flow chart of the second embodiment of the anti-jamming method for the capacitive touch screen of the touch terminal of the present invention, as shown in Fig. 2, the difference between this embodiment and the first embodiment of the method of the present invention is that , the method also includes the steps of:

S0. Setting multiple intervals for the capacitance value of the capacitive touch screen, and assigning a threshold adjustment value to each interval. the

In this embodiment, step S1 includes the following sub-steps:

S11. If the touch terminal is connected to a USB peripheral, obtain the capacitance value of the capacitive touch screen after the USB peripheral is connected;

S12. Determine the interval to which the capacitance value belongs, and adjust the response threshold value of the capacitive touch screen according to the threshold adjustment value corresponding to the interval, so as to reduce the response sensitivity of the capacitive touch screen. the

In this embodiment, considering that the touch terminal is connected to different USB peripherals, the capacitance value generated by the capacitive touch screen will be different, the capacitance value of the capacitive touch screen is divided into multiple intervals, and a threshold is assigned to each interval The adjustment value, the threshold adjustment value assigned to each interval can be the same or different. When it is detected that a USB peripheral is connected to the touch terminal, obtain the capacitance value of the capacitive touch screen after the USB peripheral is connected, judge the interval it belongs to, and then adjust the current response of the capacitive touch screen according to the threshold adjustment value corresponding to the interval Threshold value to increase the current response threshold to degrade the response sensitivity of the capacitive touch screen. Wherein, the current response threshold may be multiplied or added to the threshold adjustment value to obtain the target response threshold. the

In this embodiment, when the touch terminal is connected to different USB peripherals, the response sensitivity can be increased in different ranges, thereby reducing the impact on the normal use of the touch terminal while realizing anti-interference. the

In the third embodiment of the anti-jamming method of the present invention, the difference between it and the second embodiment of the method of the present invention is that, in this embodiment, step S1 also includes sub-steps:

S13. At regular time intervals, obtain the capacitance value of the capacitive touch screen after the touch terminal is connected to the USB peripheral, and determine whether the interval of the capacitance value changes, and if so, adjust the capacitance according to the threshold adjustment value corresponding to the current interval of the capacitance value The response threshold of the touch screen. the

In this embodiment, it is considered that the capacitance value of the capacitive touch screen due to the USB peripheral access may change as the charging degree changes during the entire process of USB peripheral access. Therefore, in the USB During the period when the peripheral device is not separated from the touch terminal, at a certain time interval, the current capacitance value of the capacitive touch screen caused by the connection of the USB peripheral device is obtained, and the current capacitance value belongs to the interval, and then the interval is judged Whether there is a change, if there is no change, the current response threshold value is maintained, and if there is a change, the response threshold value of the capacitive touch screen is adjusted according to the threshold adjustment value corresponding to the current interval. Likewise, the target response threshold can be obtained by multiplying or adding the current response threshold to the threshold adjustment value corresponding to the current interval. the

In this embodiment, when the USB peripheral is not separated from the touch terminal, the response sensitivity of the capacitive touch screen can be adjusted according to the charging process. In addition, in order to avoid conflicts, during the period when the USB peripheral is not separated from the touch terminal, if the touch of the finger is received, the operation described in step S13 will not be performed. the

Fig. 3 is a functional block diagram of a first embodiment of the anti-jamming system 100 for a capacitive touch screen of a touch terminal according to the present invention. As shown in Fig. 3, in this embodiment, the anti-jamming system 100 of the present invention includes:

The first adjustment unit 110 is used to adjust the response threshold value of the capacitive touch screen of the touch terminal when the touch terminal is connected to the USB peripheral, so as to reduce the response sensitivity of the capacitive touch screen;

The second adjustment unit 120 is configured to adjust the response threshold to a default value when the touch terminal is separated from the USB peripheral, so as to restore the response sensitivity of the capacitive touch screen. the

In this embodiment, the initialization codes of the controllers of the two sets of capacitive touch screens can be built into the software. Fig. 4 is the working flow diagram of the first embodiment of the anti-jamming system of the present invention, as shown in Fig. 4, the first adjustment unit 110 judges whether there is a USB peripheral connected to the touch terminal, and if so, uses the first set of initialization The code initializes the controller of the capacitive touch screen to reduce the response sensitivity of the capacitive touch screen. The second adjustment unit 110 judges whether the connected USB peripheral is separated from the touch terminal, and if so, uses the second set of initialization code to re-initialize the controller of the capacitive touch screen to restore the response sensitivity of the capacitive touch screen to the default value. Wherein, the second set of initialization codes is codes for normally initializing the controller of the capacitive touch screen. the

FIG. 5 is a functional block diagram of a second embodiment of the anti-jamming system 100 for a capacitive touch screen of a touch terminal according to the present invention. As shown in FIG. 5 , in this embodiment, the anti-jamming system 100 of the present invention further includes:

The setting unit 130 is configured to set multiple intervals for the capacitance value of the capacitive touch screen, and assign a threshold adjustment value to each interval. the

In this embodiment, the first adjustment unit 110 includes:

Capacitance value acquisition module 111, used to obtain the capacitance value of the capacitive touch screen after the USB peripheral is connected to the USB peripheral when the touch terminal is connected;

The first adjustment module 112 is used to determine the interval of the capacitance value obtained by the capacitance value acquisition module, and adjust the response threshold value of the capacitive touch screen according to the threshold adjustment value corresponding to the interval, so as to reduce the response sensitivity of the capacitive touch screen;

The second adjustment module 113 is used to obtain the capacitance value of the capacitive touch screen after the touch terminal is connected to the USB peripheral at a certain time interval, and judge whether the interval to which the capacitance value belongs changes. The threshold adjustment value adjusts the response threshold of the capacitive touch screen. the

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention. the

Claims (9)

1. an anti-interference method for a capacitive touch screen of a touch terminal, characterized in that, comprising the following steps: S1. If the touch terminal is connected to the USB peripheral, adjust the response threshold value of the capacitive touch screen of the touch terminal to reduce the response sensitivity of the capacitive touch screen; S2. If the touch terminal is separated from the USB peripheral, adjust the response threshold value to a default value, so as to restore the response sensitivity of the capacitive touch screen. the 2. anti-jamming method according to claim 1, is characterized in that, described method also comprises: S0. Setting multiple intervals for the capacitance value of the capacitive touch screen, and assigning a corresponding threshold adjustment value to each interval. 3. anti-interference method according to claim 2, is characterized in that, step S1 comprises the following sub-steps: S11. If the touch terminal is connected to a USB peripheral, obtain the capacitance value of the capacitive touch screen after the USB peripheral is connected; S12. Determine the interval to which the capacitance value belongs, and adjust the response threshold value of the capacitive touch screen according to the threshold adjustment value corresponding to the interval, so as to reduce the response sensitivity of the capacitive touch screen. the 4. anti-jamming method according to claim 3, is characterized in that, step S1 also comprises the following sub-steps: S13. At regular time intervals, obtain the capacitance value of the capacitive touch screen after the touch terminal is connected to the USB peripheral, and determine whether the interval of the capacitance value changes, and if so, adjust the capacitance according to the threshold adjustment value corresponding to the current interval of the capacitance value The response threshold of the touch screen. the 5. An anti-jamming system (100) for a capacitive touch screen of a touch terminal, characterized in that it comprises: The first adjustment unit (110) is used to adjust the response threshold value of the capacitive touch screen of the touch terminal when the touch terminal is connected to the USB peripheral, so as to reduce the response sensitivity of the capacitive touch screen; The second adjustment unit (120) is configured to adjust the response threshold value to a default value when the touch terminal is separated from the USB peripheral, so as to restore the response sensitivity of the capacitive touch screen. the 6. The anti-interference system (100) according to claim 5, characterized in that, the system further comprises: A setting unit (130), configured to set multiple intervals for the capacitance value of the capacitive touch screen, and assign a corresponding threshold adjustment value to each interval. the 7. The anti-interference system (100) according to claim 6, characterized in that, the first adjustment unit (110) comprises: Capacitance value acquisition module (111), used for obtaining the capacitance value of the capacitive touch screen after the USB peripheral is connected to the USB peripheral when the touch terminal is connected to the USB peripheral; A first adjustment module (112), configured to determine the interval to which the capacitance value obtained by the capacitance value acquisition module belongs, and adjust the response threshold value of the capacitive touch screen according to the threshold adjustment value corresponding to the interval, so as to reduce the response sensitivity of the capacitive touch screen . the 8. The anti-interference system (100) according to claim 7, characterized in that, the first adjustment unit (110) further comprises: The second adjustment module (113) is used to obtain the capacitance value of the capacitive touch screen after the touch terminal is connected to the USB peripheral at regular time intervals, and determine whether the interval to which the capacitance value belongs changes. The threshold adjustment value corresponding to the interval adjusts the response threshold value of the capacitive touch screen. the 9. A touch terminal, characterized in that it comprises the anti-interference system (100) according to any one of claims 5-8. the

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