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Electronic device for preventing malfunction of touch panel and method for preventing malfunction

A technology for electronic equipment and touch panels, applied in electrical components, electrical digital data processing, and data processing input/output processes, etc., can solve problems such as troublesome adjustment of the installation environment, and achieve the effect of preventing malfunctions

Active Publication Date: 2021-01-15
LENOVO PC INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method of checking the noise detection level and the finger detection level to appropriately set the detection threshold is considered, but it is cumbersome to adjust independently due to differences in the installation environment

Method used

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  • Electronic device for preventing malfunction of touch panel and method for preventing malfunction
  • Electronic device for preventing malfunction of touch panel and method for preventing malfunction
  • Electronic device for preventing malfunction of touch panel and method for preventing malfunction

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Embodiment Construction

[0019] [Electromagnetic coupling type wireless communication]

[0020] For most wireless communications, the energy radiated by the transmitting antenna becomes electromagnetic waves and propagates in space, and the receiving antenna absorbs energy from the electromagnetic waves in space. When an AC voltage is applied to the transmitting antenna, a high-frequency current flows to generate an electric field and a magnetic field (electromagnetic field) around the antenna. Electromagnetic waves used for wireless communication are generated in such a way that electric fields and magnetic fields interlock and propagate over long distances. Data can be transmitted by modulating an electromagnetic wave serving as a carrier wave with a baseband signal.

[0021] On the other hand, when an alternating current flows through the transmitting coil, an alternating magnetic field is generated in a nearby space. The alternating magnetic field generates alternating magnetic flux having a mag...

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PUM

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Abstract

The present invention relates to an electronic device that prevents malfunction of a touch panel and a method for preventing malfunction. An electronic device equipped with a wireless module and a touch panel prevents malfunction of the touch panel. An NFC coil (21) is arranged below the touch panel (19). During NFC, the NFC card (51) is close to the surface of the touch panel (19). The touch controller sets the finger detection sensitivity as a reference value when the NFC module does not emit alternating magnetic flux. The touch controller reduces the detection sensitivity at the moment when the NFC coil (21) starts emitting alternating magnetic flux. The touch controller returns the detection sensitivity to the reference value at the moment when the NFC coil (21) stops emitting alternating magnetic flux. For the signal of the touch controller changing the detection sensitivity, the NFC module sends it directly to the touch controller through the hardware line.

Description

technical field [0001] The present invention relates to a technique for preventing malfunction of a touch panel arranged near an antenna. Background technique [0002] In the NFC (Near Field Communication: Near Field Communication) Forum, a standard organization that formulates technical standards and stipulates it as the communication standard of ISO / IEC14443 and ISO / IEC18092, it is possible to make the NFC coils close to each other by 2cm to 4cm or less to communicate. . Some of recent note-type portable computers (notebooks) support NFC. [0003] For notebooks, in terms of physical aspects such as reducing the impact on the case and countermeasures against interference with other devices, the location directly below the touchpad is suitable for installing the NFC coil. On the other hand, if the NFC coil radiates magnetic flux, it can be confirmed that the touch panel malfunctions due to noise. Various countermeasures for preventing malfunctions have been implemented so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/0354G06F3/038G06F3/041G06F1/16
CPCG06F3/0418G06F3/04166H04B5/70G06F3/0416G06F3/041G06F3/03547
Inventor 堀越秀人中条秀和北村昌宏堀内光雄
Owner LENOVO PC INT
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