公开(公告)号：US20130157564A1

公开(公告)日：2013-06-20

申请号：US13693635

申请日：2012-12-04

Applicant: Microchip Technology Incorporated

Inventor： Keith Edwin Curtis ,  Yann LeFaou ,  Fanie Duvenhage

IPC: H04W52/52

CPC classification number: H04W52/52 ,  H04B1/3838 ,  H04W52/283

Abstract: A combination of capacitive, mutual capacitive, and inductive proximity and touch sensing is used to detect the presence and nature of nearby objects to a wireless device. When the proximity of metal or a user is sensed the output power of a Wi-Fi module in the device is reduced so as to prevent harm to the user and/or the Wi-Fi transmitter amplifier circuits. Inductive sensors located at the four corners of the wireless device are used to detect metal, and capacitive sensors are used to detect a capacitance change or shift due to the presence of a user's hand, body or metal. In addition, the capacitive sensors may be located at the four corners of the device and can measure changes in the mutual capacitance coupling between these capacitive sensors.

Abstract translation: 使用电容式，互电容式和电感式接近式和触摸感测的组合来检测附近对象到无线设备的存在和性质。 当感测到金属或用户的接近度时，设备中的Wi-Fi模块的输出功率被降低，以防止对用户和/或Wi-Fi发射机放大器电路的危害。 位于无线设备四角的感应传感器用于检测金属，电容传感器用于检测由于用户的手，身体或金属的存在而导致的电容变化或偏移。 此外，电容传感器可以位于器件的四个角，并且可以测量这些电容式传感器之间的互电容耦合的变化。