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Capacitive touch sensor and touch control terminal and anti-interference method and system thereof

A touch controller and terminal technology, which is applied in the input/output process of instruments, electrical digital data processing, and data processing, etc., can solve the problem that the common mode interference of charging power cannot be effectively suppressed, the mobile phone cannot be operated, and the touch control fails. problem, to achieve the effect of good control of the touch screen

Active Publication Date: 2012-12-26
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] While capacitive touch mobile terminals bring good user experience to users, there are inevitably some problems. Taking mobile phones as an example, when a capacitive touch mobile phone uses a charger to charge the battery of the mobile phone, if the charger does not Carrying out good electromagnetic compatibility (EMC, Electro Magnetic Compatibility) design, the common-mode interference generated by the charging power supply cannot be effectively suppressed, and this common-mode interference will lead to problems such as touch failure and inability to operate the mobile phone

Method used

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  • Capacitive touch sensor and touch control terminal and anti-interference method and system thereof
  • Capacitive touch sensor and touch control terminal and anti-interference method and system thereof
  • Capacitive touch sensor and touch control terminal and anti-interference method and system thereof

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Embodiment 1

[0050] see figure 1 As shown, it is a flow chart of the anti-interference method according to Embodiment 1 of the present invention. The method includes the following steps:

[0051] Step S101: Determine whether the touch terminal is in a charging state, and if so, perform subsequent steps.

[0052] This step can be realized by cooperating with the main control chip of the touch terminal and the touch controller in the capacitive touch sensor, and the touch controller is a chip in the capacitive touch sensor that controls the touch. After the touch terminal is connected to the charger, the charger charges the battery of the touch terminal through the power supply, and at this time, the main control chip notifies the touch controller to enter the charging mode. After receiving the notification of entering the charging mode, the touch controller detects the corresponding interface flag, and determines whether the touch terminal enters the charging state. For example, when the...

Embodiment 2

[0065] see image 3 As shown, it is a flowchart of the anti-interference method according to Embodiment 2 of the present invention. The main difference between this embodiment and Embodiment 1 is that this embodiment does not detect interference immediately after entering the charging state, but starts to detect interference when the user wants to perform a touch operation. The method comprises the steps of:

[0066] Step S201: Determine whether the touch terminal enters a charging state. If yes, go to step S202; otherwise, end the process, and continue to execute other programs in the main process of the touch terminal.

[0067] Step S202: Determine whether the screen is activated or whether the user operates the screen. If yes, go to step S203; otherwise, end the process, and continue to execute other programs in the main process of the touch terminal.

[0068] During the charging process, when the user does not need to perform a touch operation, interference detection m...

Embodiment 3

[0076] see Figure 4 As shown, it is a flow chart of the anti-interference method according to Embodiment 3 of the present invention. The main difference between this embodiment and Embodiment 1 is that in this embodiment, after selecting an appropriate frequency for frequency hopping, the interference signal is re-detected. If there is still a suspected signal, the charging function of the charger is temporarily turned off, or the The charging current decreases.

[0077] Step S301: Determine whether the touch terminal enters a charging state. If yes, go to step S302; otherwise, end the process, and continue to execute other programs in the main process of the touch terminal.

[0078] Step S302: Detect interference.

[0079] Step S303: Determine whether the detected interference matches the first preset condition. If yes, go to step S205; otherwise, end the process, and continue to execute other programs in the main process of the touch terminal.

[0080] Step S304: Scan ...

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Abstract

The invention relates to the technical field of a touch sensor, and provides an anti-interference method. The method includes the following steps: a touch control terminal is judged if the touch control terminal enters into a charging state, if the touch control terminal enters into the charging state, then follow-up procedures are carried out; interference is detected; when an interference according with a first preset condition is detected, then a touch screen driving frequency is selected to trip off interference frequency. The invention further provides an anti-interference system, a capacitive touch sensor and a touch control terminal. The capacitive touch sensor, the touch control terminal and the anti-interference method and the system thereof detect interference after the touch control terminal enters into the charging state, when the interference fitting the preset condition is detected, the touch screen driving frequency is selected to trip off the interference frequency, so that influences to touch control operation by common mode interference generated when the touch control terminal is connected with a charger and charged can be reduced or eliminated.

Description

technical field [0001] The present invention relates to the technical field of touch sensors, in particular to a capacitive touch sensor, a touch terminal and an anti-interference method and system thereof. Background technique [0002] With the development of touch technology and mobile terminal technology, more and more mobile terminals use touch to perform human-computer interaction. At present, the touch screens used in mobile terminals mainly include capacitive touch screens and resistive touch screens. Among them, capacitive touch screens are favored by more and more users due to their good clarity, light transmittance and touch. [0003] While a capacitive touch mobile terminal brings a good user experience to users, it also inevitably has some problems. Taking a mobile phone as an example, when a capacitive touch mobile phone uses a charger to charge the battery of the mobile phone, if the charger does not With good electromagnetic compatibility (EMC, Electro Magnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/00G06F3/044G06F3/04166G06F3/0418
Inventor 阮滨陈伟
Owner SHENZHEN GOODIX TECH CO LTD
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