Patents by Inventor Hehai Zheng

Hehai Zheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Intelligent proximity detector
    Patent number: 11237613
    Abstract: A capacitive proximity sensor for use in mobile devices such as smartphones and connected tables, in which it is used to switch off a display (70) when the device is brought to the ear. The capacitive sensor is arranged for rejecting spurious detection induced, for example, by condensation, ingress of water, or thermal drift, based on the time variations of a capacity seen by the readout circuit (80), Additionally, the proximity sensor may integrate signals form motion sensors, temperature sensors or other sensors, to discriminate spurious proximity signals.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: February 1, 2022
    Assignee: Semtech Corporation
    Inventors: Chaouki Rouaissia, Hehai Zheng
  • Proximity sensor and mobile wireless device
    Patent number: 11082550
    Abstract: A capacitive proximity sensor for use in mobile devices such as smartphones and connected tables, in which it is used to switch off a display (70) when the device is brought to the ear, and to reduce selectively the RF power when the device is in close proximity to a body part of a user, in order to fulfil regulatory SAR limits. The capacitive sensor uses two electrodes (60, 30), the first of which may also serve as RF antenna, and the other is preferably on the back of the phone and is opposite the display.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: August 3, 2021
    Assignee: Semtech Corporation
    Inventors: Chaouki Rouaissia, Hehai Zheng
  • INTELLIGENT PROXIMITY DETECTOR
    Publication number: 20200021680
    Abstract: A capacitive proximity sensor for use in mobile devices such as smartphones and connected tables, in which it is used to switch off a display (70) when the device is brought to the ear. The capacitive sensor is arranged for rejecting spurious detection induced, for example, by condensation, ingress of water, or thermal drift, based on the time variations of a capacity seen by the readout circuit (80), Additionally, the proximity sensor may integrate signals form motion sensors, temperature sensors or other sensors, to discriminate spurious proximity signals.
    Type: Application
    Filed: May 15, 2019
    Publication date: January 16, 2020
    Inventors: Chaouki ROUAISSIA, Hehai ZHENG
  • PROXIMITY SENSOR AND MOBILE WIRELESS DEVICE
    Publication number: 20200014789
    Abstract: A capacitive proximity sensor for use in mobile devices such as smartphones and connected tables, in which it is used to switch off a display (70) when the device is brought to the ear, and to reduce selectively the RF power when the device is in close proximity to a body part of a user, in order to fulfil regulatory SAR limits. The capacitive sensor uses two electrodes (60, 30), the first of which may also serve as RF antenna, and the other is preferably on the back of the phone and is opposite the display.
    Type: Application
    Filed: May 15, 2019
    Publication date: January 9, 2020
    Inventors: Chaouki Rouaissia, Hehai Zheng