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：US20140225859A1

公开(公告)日：2014-08-14

申请号：US13890524

申请日：2013-05-09

Applicant: BROADCOM CORPORATION

Inventor： Massoud Badaye ,  Sumant Ranganathan

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F2203/04103 ,  G06F2203/04111

Abstract: Elements are provided that mitigate the effects of at least one of charger noise, display noise, and non-grounding in a capacitive touch panel system. Such elements may include an array of sense lines made up of sense electrodes that are shaped differently from drive electrodes making up an array of drive lines, where the area occupied by the sense electrodes is substantially less than that taken up by the drive electrodes. Additionally, the shape of the sense electrodes, despite mitigating the aforementioned effects of charger noise, display noise, and non-grounding, maintains touch detection sensitivity.

Abstract translation: 提供了减轻电容式触摸屏系统中的充电器噪声，显示噪声和非接地中的至少一种的影响的元件。 这样的元件可以包括由感测电极组成的感测线阵列，该感测线与形成驱动线阵列的驱动电极成形不同，其中由感测电极占据的面积基本上小于由驱动电极占据的面积。 此外，感测电极的形状尽管减轻了充电器噪声，显示噪声和非接地的上述影响，但保持了触摸检测灵敏度。

公开(公告)号：US20140176359A1

公开(公告)日：2014-06-26

申请号：US13722388

申请日：2012-12-20

Applicant: BROADCOM CORPORATION

Inventor： Jason Hu ,  Xinyu Yu ,  Jing Yang ,  Sumant Ranganathan

IPC: H03M1/12

CPC classification number: H03M1/0845

Abstract: An analog-to-digital converter (ADC) includes reference charge cancellation features to at least partially offset a voltage distortion on a bypass capacitor of a reference buffer due to a voltage reference hit taken by a switched capacitor bank with which the bypass capacitor is connected. The charge cancellation may be configured in logic to be input signal dependent because different resolved bits or transitions between resolved bits may cause different amounts of voltage reference hits. By adjusting the bypass capacitor in response to each of at least some of the reference hits while resolving a word of bits, the reference voltage signal provided by the bypass capacitor undergoes far less settling, remaining more stable and linear for a more accurate reference voltage. Furthermore, a smaller capacitor may be used for the bypass capacitor, reducing power consumption and area on chip.

Abstract translation: 模数转换器（ADC）包括参考电荷消除特征，以至少部分地偏移参考缓冲器的旁路电容器上的电压失真，这是由于旁路电容器连接的开关电容器组所引起的电压基准点 。 电荷消除可以被配置为逻辑以输入信号，因为解析的位之间的不同的分辨位或转换可能导致不同量的电压参考点。 通过在解析位字时响应于至少一些参考命中中的每一个来调节旁路电容器，由旁路电容器提供的参考电压信号经历较少的稳定，对于更准确的参考电压，保持更稳定和线性。 此外，旁路电容器可以使用较小的电容器，从而降低功耗和芯片上的面积。

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：US08749425B1

公开(公告)日：2014-06-10

申请号：US13722388

申请日：2012-12-20

Applicant: Broadcom Corporation

Inventor： Jason Hu ,  Xinyu Yu ,  Jing Yang ,  Sumant Ranganathan

IPC: H03M1/12

CPC classification number: H03M1/0845

Abstract: An analog-to-digital converter (ADC) includes reference charge cancellation features to at least partially offset a voltage distortion on a bypass capacitor of a reference buffer due to a voltage reference hit taken by a switched capacitor bank with which the bypass capacitor is connected. The charge cancellation may be configured in logic to be input signal dependent because different resolved bits or transitions between resolved bits may cause different amounts of voltage reference hits. By adjusting the bypass capacitor in response to each of at least some of the reference hits while resolving a word of bits, the reference voltage signal provided by the bypass capacitor undergoes far less settling, remaining more stable and linear for a more accurate reference voltage. Furthermore, a smaller capacitor may be used for the bypass capacitor, reducing power consumption and area on chip.

Abstract translation: 模数转换器（ADC）包括参考电荷消除特征，以至少部分地偏移参考缓冲器的旁路电容器上的电压失真，这是由于旁路电容器连接的开关电容器组所引起的电压基准点 。 电荷消除可以被配置为逻辑以输入信号，因为解析的位之间的不同的分辨位或转换可能导致不同量的电压参考点。 通过在解析位字时响应于至少一些参考命中中的每一个来调节旁路电容器，由旁路电容器提供的参考电压信号经历较少的稳定度，对于更精确的参考电压而言保持更稳定和线性。 此外，旁路电容器可以使用较小的电容器，从而降低功耗和芯片上的面积。

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：US20130237322A1

公开(公告)日：2013-09-12

申请号：US13867316

申请日：2013-04-22

Applicant: BROADCOM CORPORATION

Inventor： David A. Sobel ,  Monika Gupta ,  Sumant Ranganathan ,  Pieter Vorenkamp ,  Jeyhan Karaoguz

IPC: G06F3/033

CPC classification number: G06F3/033 ,  G06F21/32

Abstract: A game controller with a communications interface includes a touch sensitive pad having a plurality of touch sensitive elements, and processing circuitry coupled to the communications interface and the at least one touch sensitive pad. The processing circuitry enacts touch pad configuration settings that correlate subsets of the plurality of touch sensitive elements to produce distinct user input locations. The processing circuitry receives touch pad input from the at least one touch sensitive pad. The processing circuitry processes the touch pad input to determine user input directions based upon the touch pad configuration settings, and then transmits the touch pad input directions via the communications interface for use as gaming input.

Abstract translation: 具有通信接口的游戏控制器包括具有多个触摸敏感元件的触敏垫，以及耦合到该通信接口和该至少一个触敏垫的处理电路。 处理电路执行使多个触敏元件的子集相关联以产生不同的用户输入位置的触摸板配置设置。 所述处理电路从所述至少一个触敏板接收触摸板输入。 处理电路处理触摸板输入以基于触摸板配置设置来确定用户输入方向，然后经由通信接口发送触摸板输入方向以用作游戏输入。

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。