公开(公告)号：US09024912B2

公开(公告)日：2015-05-05

申请号：US13732208

申请日：2012-12-31

Applicant: Broadcom Corporation

Inventor： Ian Atkinson ,  Sumant Ranganathan ,  Federico Cattivelli ,  Glen Weaver ,  John Walley ,  Tianhao Li ,  David Sobel

IPC: G06F3/045 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0418

Abstract: Systems and methods are provided that allow a touch sensor, such as a mutual capacitive touch panel, to switch from an operative transmit (TX) frequency at which the mutual capacitive touch panel is driven to an alternative TX frequency. When switching to an alternative TX frequency, an alternative baseline capacitance value corresponding to the alternative TX frequency may be utilized to determine whether a touch event has occurred on the mutual capacitive touch panel. Frame scans can be repeatedly performed at the operative TX frequency and the alternative TX frequency in rapid succession, and an average difference of the frame scans can be calculated and utilized to generate the alternative baseline capacitance value which may be insensitive to sudden ambient changes and moving touch events affecting the mutual touch capacitive panel.

Abstract translation: 提供了允许触摸传感器（例如互电容触摸面板）从相互电容性触摸面板被驱动的可操作的发射（TX）频率切换到替代TX频率的系统和方法。 当切换到替代TX频率时，可以利用对应于替代TX频率的替代基线电容值来确定在互电容式触摸面板上是否发生了触摸事件。 可以快速连续地以可操作的TX频率和替代TX频率重复执行帧扫描，并且可以计算并利用帧扫描的平均差异来生成可能对突然的环境变化和移动不敏感的替代基线电容值 触摸事件影响互触电容面板。

公开(公告)号：US20150227241A1

公开(公告)日：2015-08-13

申请号：US14690773

申请日：2015-04-20

Applicant: BROADCOM CORPORATION

Inventor： Ian Atkinson ,  Sumant Ranganathan ,  Federico Cattivelli ,  Glen Weaver ,  John Walley ,  Tianhao Li ,  David Sobel

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0418

Abstract: Systems and methods are provided that allow a touch sensor, such as a mutual capacitive touch panel, to switch from an operative transmit (TX) frequency at which the mutual capacitive touch panel is driven to an alternative TX frequency. When switching to an alternative TX frequency, an alternative baseline capacitance value corresponding to the alternative TX frequency may be utilized to determine whether a touch event has occurred on the mutual capacitive touch panel. Frame scans can be repeatedly performed at the operative TX frequency and the alternative TX frequency in rapid succession, and an average difference of the frame scans can be calculated and utilized to generate the alternative baseline capacitance value which may be insensitive to sudden ambient changes and moving touch events affecting the mutual touch capacitive panel.

Abstract translation: 提供了允许触摸传感器（例如互电容触摸面板）从相互电容性触摸面板被驱动的可操作的发射（TX）频率切换到替代TX频率的系统和方法。 当切换到替代TX频率时，可以利用对应于替代TX频率的替代基线电容值来确定在互电容式触摸面板上是否发生了触摸事件。 可以快速连续地以可操作的TX频率和替代TX频率重复执行帧扫描，并且可以计算并利用帧扫描的平均差异来生成可能对突然的环境变化和移动不敏感的替代基线电容值 触摸事件影响互触电容面板。

公开(公告)号：US20140125623A1

公开(公告)日：2014-05-08

申请号：US13732208

申请日：2012-12-31

Applicant: BROADCOM CORPORATION

Inventor： Ian Atkinson ,  Sumant Ranganathan ,  Federico Cattivelli ,  Glen Weaver ,  John Walley ,  Tianhao Li ,  David Sobel

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0418

Abstract: Systems and methods are provided that allow a touch sensor, such as a mutual capacitive touch panel, to switch from an operative transmit (TX) frequency at which the mutual capacitive touch panel is driven to an alternative TX frequency. When switching to an alternative TX frequency, an alternative baseline capacitance value corresponding to the alternative TX frequency may be utilized to determine whether a touch event has occurred on the mutual capacitive touch panel. Frame scans can be repeatedly performed at the operative TX frequency and the alternative TX frequency in rapid succession, and an average difference of the frame scans can be calculated and utilized to generate the alternative baseline capacitance value which may be insensitive to sudden ambient changes and moving touch events affecting the mutual touch capacitive panel.

Abstract translation: 提供了允许触摸传感器（例如互电容触摸面板）从相互电容性触摸面板被驱动的可操作的发射（TX）频率切换到替代TX频率的系统和方法。 当切换到替代TX频率时，可以利用对应于替代TX频率的替代基线电容值来确定在互电容式触摸面板上是否发生了触摸事件。 可以快速连续地以可操作的TX频率和替代TX频率重复执行帧扫描，并且可以计算并利用帧扫描的平均差异来生成可能对突然的环境变化和移动不敏感的替代基线电容值 触摸事件影响互触电容面板。