公开(公告)号：US20160062546A1

公开(公告)日：2016-03-03

申请号：US14474960

申请日：2014-09-02

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello ,  Jenn Woei Soo ,  Lokesh Kumar Korapati

IPC: G06F3/041 ,  G09G5/12 ,  G06F3/044

CPC classification number: G09G5/12 ,  G06F3/044 ,  G09G2320/0247

Abstract: A video display includes a video display panel and a video display drive circuit configured to control a display on condition. A touch screen includes a touch screen panel (mounted on top of the video display panel) and a touch panel control and sense circuit configured to operate the touch screen panel in a self-capacitance mode. The touch panel control and sense circuit includes sense drive circuits configured to generate sense drive signals for application to sense lines of the touch screen panel. A controller controls actuation of the sense drive circuits so that the sense drive signals are synchronized to the display on condition. In an implementation, the leading edges of the sense drive signals are synchronized to the display on condition. In another implementation, a window is synchronized to the display on condition and the leading edges of the sense drive signals exhibit jitter within the window.

Abstract translation: 视频显示器包括视频显示面板和视频显示驱动电路，视频显示驱动电路被配置为控制显示状态。 触摸屏包括触摸屏面板（安装在视频显示面板的顶部）以及触摸面板控制和感测电路，被配置为以自电容模式操作触摸屏面板。 触摸面板控制和感测电路包括感测驱动电路，其被配置为产生感测驱动信号以用于感测触摸屏面板的线。 控制器控制感测驱动电路的致动，使得感测驱动信号在状态下与显示器同步。 在一个实现中，感测驱动信号的前沿在状态下与显示器同步。 在另一实现中，窗口在条件下与显示器同步，并且感测驱动信号的前沿在窗口内呈现抖动。

公开(公告)号：US09240295B2

公开(公告)日：2016-01-19

申请号：US13233214

申请日：2011-09-15

Applicant: Hong Chean Choo ,  Kien Beng Tan ,  Gee Heng Loh

Inventor： Hong Chean Choo ,  Kien Beng Tan ,  Gee Heng Loh

IPC: H03K17/94 ,  H03M11/00 ,  H03K17/62 ,  H01H13/70

CPC classification number: H01H13/70 ,  H01H2239/004 ,  H01H2239/01

Abstract: Disclosed is keypad circuitry operable to detect a pressed key while reducing electromagnetic interference (EMI). The keypad circuitry is operable to reduce EMI in two ways: a) reducing the voltage swing occurring at the row circuitry and column circuitry of the keypad, and b) reducing the number of signal transitions by restricting the signal transitions to occurring at the column and row corresponding to a pressed key. By limiting signal transitions to occurring only at the row and column corresponding to a pressed key, fewer signal transitions occur, and thus, less EMI is produced. Additionally, reduced voltage swings at the row circuitry and column circuitry results in reduced EMI.

Abstract translation: 公开了可操作以在减少电磁干扰（EMI）的同时检测按下的键的键盘电路。 键盘电路可操作以两种方式降低EMI：a）降低在键盘的行电路和列电路处发生的电压摆幅，以及b）通过限制信号转变发生在列而减少信号转换的数量，以及 行对应于按下的键。 通过将信号转换限制在对应于按下的键的行和列上才发生，产生较少的信号转换，从而产生更少的EMI。 另外，行电路和列电路的减小的电压摆幅导致EMI降低。

公开(公告)号：US09235289B2

公开(公告)日：2016-01-12

申请号：US13562217

申请日：2012-07-30

Applicant: Maria Rhea Santos

Inventor： Maria Rhea Santos

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044

Abstract: A touch controller includes a touch frame processing (TFP) component that receives sensor signals containing information about a touch point on a touch screen. The TFP component processes the sensor signals to generate touch information associated with each touch point. The touch information includes a location and the association of one of a touch-in, touch-out, and touch-motion event. A touch coordinate processing (TCP) component receives touch information from the TFP component and determines whether to report the touch information associated with a current touch point. The TCP component determines a difference between the location of the current touch point and a previously detected touch point and assigns a motion status to each touch event and reports the touch information when the difference is greater than a motion tolerance and when less than the motion tolerance selectively blocks or reports the touch information as a function of the corresponding motion status.

Abstract translation: 触摸控制器包括接收包含触摸屏上的触摸点信息的传感器信号的触摸框处理（TFP）组件。 TFP组件处理传感器信号以产生与每个触摸点相关联的触摸信息。 触摸信息包括触摸，触摸和触摸移动事件之一的位置和关联。 触摸坐标处理（TCP）组件从TFP组件接收触摸信息，并确定是否报告与当前触摸点相关联的触摸信息。 TCP组件确定当前触摸点的位置与先前检测到的触摸点之间的差异，并且在每个触摸事件分配运动状态并且当差值大于运动容限时报告触摸信息，并且当小于运动公差 根据相应的运动状态有选择地阻止或报告触摸信息。

公开(公告)号：US09234804B2

公开(公告)日：2016-01-12

申请号：US13339868

申请日：2011-12-29

Applicant: Mukesh Rao Englasyam ,  Yann Desprez-Le-Goarant

Inventor： Mukesh Rao Englasyam ,  Yann Desprez-Le-Goarant

IPC: G01K7/00 ,  G01K7/01

CPC classification number: G01K7/015

Abstract: An integrated temperature sensor provides an output current proportional to temperature rising from a zero value at a selectable reference temperature. The reference temperature can be selected by varying resistive values in the sensor's circuit. The temperature sensor can be manufactured at low cost and fully integrated on a chip using CMOS technology, and may be used for low-power applications.

Abstract translation: 集成温度传感器提供与在可选参考温度下从零值上升的温度成比例的输出电流。 可以通过改变传感器电路中的电阻值来选择参考温度。 温度传感器可以低成本制造，并使用CMOS技术完全集成在芯片上，可用于低功耗应用。

公开(公告)号：US09229576B2

公开(公告)日：2016-01-05

申请号：US13648149

申请日：2012-10-09

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD (SINGAPORE)

Inventor： HonSiong Ng ,  Praveesh Chandran ,  Mythreyi Nagarajan ,  Ravi Bhatia

IPC: G06F3/041

CPC classification number: G06F3/0418

Abstract: A method comprises during a frame period finding a first EFT noise influenced sensor of a touch screen panel, determining whether the first EFT noise influenced sensor is located at a last transmitting/driving line of the touch screen panel, designating the frame period as a noise influenced frame period using an absolute value threshold if the first EFT noise influenced sensor is not located at the last transmitting/driving line and designating the frame period as the noise influenced frame period using a percentage threshold if the first EFT noise influenced sensor is located at the last transmitting/driving line.

Abstract translation: 一种方法包括在帧周期期间找到触摸屏面板的第一EFT噪声影响传感器，确定所述第一EFT噪声影响传感器是否位于所述触摸屏面板的最后发射/驱动线上，将所述帧周期指定为噪声 如果第一EFT噪声影响传感器不位于最后的发射/驱动线路，并且如果第一EFT噪声影响传感器位于位置时，使用百分比阈值指定帧周期作为噪声影响帧周期，则使用绝对值阈值 最后一个发射/行驶线。

公开(公告)号：US20150338950A1

公开(公告)日：2015-11-26

申请号：US14284650

申请日：2014-05-22

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello

IPC: G06F3/044 ,  G06F3/0354

CPC classification number: G06F3/044 ,  G06F3/03545

Abstract: A touch screen device is configured with rows of conductors capable of receiving wireless signals from a stylus. When the stylus touches the touch screen, the stylus emits multiple wireless signals in different directions. The conductors receiving the emitted wireless signals provide the signals to circuitry that filters, amplifies, and digitizes the wireless signals, as received at each conductor. The magnitude of each conductor's received wireless signal is computed, and the computed magnitudes are used to determine the location of the stylus on the touch screen surface. The stylus is assumed to be closer to conductors receiving stronger signals than those receiving weaker signals.

Abstract translation: 触摸屏设备配置有能够从触控笔接收无线信号的导体行。 当触控笔触摸触摸屏时，触笔在不同方向发出多个无线信号。 接收发射的无线信号的导体向每个导体所接收的无线信号的电路提供信号，该电路对无线信号进行滤波，放大和数字化。 计算每个导体的接收无线信号的幅度，并且使用计算出的幅度来确定触控笔在触摸屏表面上的位置。 假设触针比接收较弱信号的导体更接近于接收更强信号的导体。

公开(公告)号：US09163954B2

公开(公告)日：2015-10-20

申请号：US13339715

申请日：2011-12-29

Applicant: Chee Weng Cheong ,  Yannick Guedon

Inventor： Chee Weng Cheong ,  Yannick Guedon

IPC: G01R27/26 ,  G01D3/036 ,  G06F3/044 ,  G01D5/24

CPC classification number: G01D3/036 ,  G01D5/24 ,  G01R27/2605 ,  G06F3/044 ,  H03K2217/960705

Abstract: Circuitry is described for compensating leakage currents in capacitive sensing circuits. A single active leakage compensation circuit may sense a representative leakage current and drive a plurality of output transistors, each of which provides a compensating current to a respective capacitive sensing circuit. The leakage compensation circuit may sense current flow through a device substantially equivalent to a device exhibiting leakage current in a capacitive sensing circuit, and in response, provide a signal to drive one or more output transistors to supply approximately equivalent currents to a plurality of circuit nodes. For embodiments having multiple similar capacitive sensors and capacitive sensing circuits, only one transistor need be added to each capacitive sensing circuit to compensate for leakage current.

Abstract translation: 描述电路用于补偿电容式感测电路中的漏电流。 单个有源泄漏补偿电路可以感测代表性的漏电流并驱动多个输出晶体管，每个输出晶体管向相应的电容感测电路提供补偿电流。 泄漏补偿电路可以感测通过与电容感测电路中呈现泄漏电流的器件基本相当的器件的电流，并且作为响应，提供信号以驱动一个或多个输出晶体管以向多个电路节点提供近似等效的电流 。 对于具有多个类似的电容传感器和电容感测电路的实施例，仅需要将一个晶体管添加到每个电容感测电路以补偿漏电流。

公开(公告)号：US09137054B2

公开(公告)日：2015-09-15

申请号：US13284898

申请日：2011-10-29

Applicant: Muralidhar Karthik ,  George A. Vlantis

Inventor： Muralidhar Karthik ,  George A. Vlantis

IPC: H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04L25/022 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/03821 ,  H04L27/2601

Abstract: In an embodiment, a transmitter includes a transmission path that is configurable to generate first pilot clusters each including a respective first pilot subsymbol in a first cluster position and a respective second pilot subsymbol in a second cluster position such that a vector formed by the first pilot subsymbols is orthogonal to a vector formed by the second pilot subsymbols. For example, where such a transmitter transmits simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) over respective channels that may impart inter-carrier interference (ICI) to the signals due to Doppler spread, the pattern of the pilot symbols that compose the pilot clusters may allow a receiver of these signals to estimate the responses of these channels more accurately than conventional receivers.

Abstract translation: 在一个实施例中，发射机包括可配置为生成第一导频簇的传输路径，每个导频簇包括第一簇位置中的相应第一导频子符号和第二簇位置中的相应第二导频子符号，使得由第一导频形成的向量 子符号与由第二导航子符号形成的向量正交。 例如，在这种发射机通过可能由于多普勒扩频而给予信号的载波间干扰（ICI）的相应信道上发射同时正交频分复用（OFDM）信号（例如，MIMO-OFDM信号）的情况下， 构成导频簇的导频符号的模式可以允许这些信号的接收机比常规接收机更准确地估计这些信道的响应。

公开(公告)号：US20150253799A1

公开(公告)日：2015-09-10

申请号：US14201590

申请日：2014-03-07

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： CheeWeng Cheong ,  Kien Beng Tan ,  Dianbo Guo

IPC: G05F3/16

CPC classification number: G05F3/16 ,  G05F3/262

Abstract: A current source includes a first current path including a first current mirror transistor and an input current source coupled in series, a second current path including a second current minor transistor, wherein control terminals of the first and second current minor transistors are connected, a first circuit configured to provide a controlled auxiliary current in the second current path, and a second circuit configured to provide a controlled output current in the second current path when or after the auxiliary current has reached steady state. The current source may include one or more cascode transistors in the first current path and one or more cascode transistors in the second current path. The first circuit may be activated before the second circuit is activated.

Abstract translation: 电流源包括包括串联耦合的第一电流镜晶体管和输入电流源的第一电流路径，包括第二电流次级晶体管的第二电流路径，其中连接第一和第二电流次级晶体管的控制端，第一 电路，被配置为在第二电流路径中提供受控的辅助电流;以及第二电路，被配置为在辅助电流达到稳定状态时或之后提供第二电流路径中的受控输出电流。 电流源可以包括第一电流路径中的一个或多个共源共栅晶体管和第二电流路径中的一个或多个共源共栅晶体管。 第一电路可以在第二电路被激活之前被激活。

公开(公告)号：US09128573B2

公开(公告)日：2015-09-08

申请号：US13619328

申请日：2012-09-14

Applicant: Paolo Angelini ,  Giovanni Carlo Tripoli ,  Ernesto Lasalandra ,  Tommaso Ungaretti ,  Kien Beng Tan ,  Yannick Guedon ,  Dianbo Guo ,  Sze-Kwang Tan

Inventor： Paolo Angelini ,  Giovanni Carlo Tripoli ,  Ernesto Lasalandra ,  Tommaso Ungaretti ,  Kien Beng Tan ,  Yannick Guedon ,  Dianbo Guo ,  Sze-Kwang Tan

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: Capacitance sensing circuits and methods are provided. The capacitance sensing circuit includes a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance, an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed, an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value, an amplifier configured to amplify the accumulated analog value, and an analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed. The analog accumulator may include a low pass filter having a frequency response to filter wideband noise.

Abstract translation: 提供电容感测电路和方法。 电容感测电路包括：电容 - 电压转换器，被配置为从要感测的电容接收信号并提供表示电容的输出信号;输出斩波器，被配置为转换电容 - 电压的输出信号 转换器到感测的电压，代表要感测的电容;模拟累加器，被配置为在NA感测周期的累积周期期间累积感测电压并提供累加的模拟值，被配置为放大所累积的模拟值的放大器和模拟 配置为将放大的累积模拟值转换为表示要感测的电容的数字值。 模拟累加器可以包括具有对滤波器宽带噪声的频率响应的低通滤波器。