公开(公告)号：US20150242021A1

公开(公告)日：2015-08-27

申请号：US14711899

申请日：2015-05-14

Applicant: Broadcom Corporation

Inventor： Glen Weaver ,  Sumant Ranganathan ,  Federicao Santiago Cattivelli ,  Tianhao Li ,  Bhupesh Kharwa ,  Satish Vithal Joshi ,  Kerrynn Jacques de Roche ,  Pi Sheng Chang

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: Control circuitry for a touch panel includes a touch panel interface, a memory comprising touch positioning logic, and a controller in communication with the memory and the touch panel interface. The controller is operable, when the touch positioning logic is executed, to perform selected processing of the touch panel, including scanning a touch panel and determining a touch panel blob resulting from a touch, obtaining blob characteristics of the touch panel blob, and determining a position of the blob relative to the touch panel based on the blob characteristics. The blob characteristics can be adjusted to more accurately position the blob in circumstances where the blob is located near the edge of the touch panel, is in close proximity to another blob, or when the touch panel has variation in the received signal noise.

Abstract translation: 用于触摸面板的控制电路包括触摸面板接口，包括触摸定位逻辑的存储器以及与存储器和触摸面板接口通信的控制器。 控制器可操作，当执行触摸定位逻辑时，执行触摸面板的选择的处理，包括扫描触摸面板并确定触摸产生的触摸面板斑点，获得触摸面板斑点的斑点特征，以及确定 基于斑点特征，斑点相对于触摸面板的位置。 可以调整斑点特征以在斑点位于触摸面板的边缘附近，紧邻另一斑点的情况下，或者当触摸面板具有接收信号噪声变化的情况下更准确地定位斑点。

公开(公告)号：US09292127B2

公开(公告)日：2016-03-22

申请号：US14607539

申请日：2015-01-28

Applicant: Broadcom Corporation

Inventor： John Walley ,  Robert Lukas ,  David Sobel ,  Sumant Ranganathan ,  Tianhao Li

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/045 ,  G06F1/32

CPC classification number: G06F3/0416 ,  G06F1/3262 ,  G06F3/044 ,  G06F3/045 ,  G06F2203/04106

Abstract: Provided are systems and methods for providing enhanced touch sensing. One system providing enhanced touch sensing includes a multi-mode touch screen and a processor configured to apply at least one test signal to a sense element of the multi-mode touch screen, detect at least one return signal from the sense element, and then determine a relative position of an object corresponding to the at least one return signal, the multi-mode touch screen being capable of sensing the first object using first and second detection modes. One multi-mode touch screen comprises a multi-mode multi-touch touch screen. One processor is configured to apply an adaptive test signal to a sense element of a touch screen.

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。

公开(公告)号：US20150253890A1

公开(公告)日：2015-09-10

申请号：US14667943

申请日：2015-03-25

Applicant: Broadcom Corporation

Inventor： David A. Sobel ,  Sumant Ranganathan ,  Tianhao Li ,  John S. Walley ,  Glen Weaver ,  Kerrynn Jacques de Roche ,  Pi Sheng Chang

IPC: G06F3/041

CPC classification number: G06F3/041 ,  G06F3/0416 ,  G06F3/044

Abstract: Asymmetric scanning logic implements asymmetric panel scanning by scanning some rows on a touch panel more frequently than other rows. Note that although an entire row at a time may be driven, if only particular pixels in the row are of interest (e.g., included in any region of interest for focused asymmetric scanning), then circuitry may power down the receivers for the columns in which the pixels exist to save power. The asymmetric scanning logic facilitates focused attention to specific areas of interest on the touch panel, to compensate, for example, for high noise or low signal strength in those areas of interest.

Abstract translation: 非对称扫描逻辑通过比其他行更频繁地扫描触摸面板上的一些行来实现非对称面板扫描。 注意，虽然可以驱动一次的整行，但是如果行中的特定像素是感兴趣的（例如，包括在用于聚焦的非对称扫描的任何感兴趣的区域中），则电路可以将其中的列的接收器断电 存在像素以节省电力。 非对称扫描逻辑有助于将注意力集中在触摸面板上的特定感兴趣区域，以补偿例如在感兴趣的区域中的高噪声或低信号强度。

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。