公开(公告)号：US20190050087A1

公开(公告)日：2019-02-14

申请号：US16162925

申请日：2018-10-17

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Praveesh CHANDRAN ,  Lokesh Kumar KORAPATI ,  Mythreyi NAGARAJAN

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F2203/04102

Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.

公开(公告)号：US20190121488A1

公开(公告)日：2019-04-25

申请号：US16223428

申请日：2018-12-18

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Praveesh CHANDRAN ,  Manivannan PONNARASU ,  Mythreyi NAGARAJAN

IPC: G06F3/041 ,  G06F3/0354 ,  G06F3/044

Abstract: A touch screen controller identifies an island in a matrix of acquired touch data values. A first sharpness of the island is calculated and a second sharpness of the island is calculated if the calculated first sharpness is greater than a sharpness threshold. A dynamic strength threshold is then determined as a function of the second sharpness if a variance of the island is greater than a dynamic variance threshold. A determination is then made that the identified island is a valid stylus island if a peak strength of the island is greater than the dynamic strength threshold.

公开(公告)号：US20140197880A1

公开(公告)日：2014-07-17

申请号：US13739112

申请日：2013-01-11

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE. LTD.

Inventor： Chee Yu NG ,  Mythreyi NAGARAJAN

IPC: H03K17/96

CPC classification number: H03K17/9622 ,  G06F3/044 ,  H03K2017/9602

Abstract: A single ITO layer design for a touchscreen panel incorporates a matrix of sensor cells formed from a single ITO layer of capacitive sensor pads, sensor bars, force lines and sense lines. Columns of multiplexed force lines are connected to rows of sensor pads to form force trees such that the force line of the end pair of sensor pads has a wide track, with the force lines of each subsequent pair of sensor pads having a reduced track width. Disposed between the columns of force trees, the matrix of sensor cells also includes columns of sensor bars connected to control circuitry via sense lines. The control circuitry applies a signal to the force trees to generate capacitance between rows of sensor pads and adjacent sensor bars. The control circuitry senses changes in the capacitance and resolves the location of a user touch in the matrix of sensor cells.

Abstract translation: 用于触摸屏面板的单个ITO层设计包括由电容式传感器焊盘，传感器棒，强制线和感测线的单个ITO层形成的传感器单元矩阵。 复合力线的列连接到传感器垫的行以形成力树，使得传感器焊盘的端对对的力线具有宽的轨迹，每个后续传感器对的力线具有减小的轨道宽度。 设置在力树柱之间，传感器单元的矩阵还包括通过感测线连接到控制电路的传感杆的列。 控制电路向力树施加信号以在传感器垫和相邻传感器条之间的行之间产生电容。 控制电路感测电容的变化，并且解决用户触摸传感器单元矩阵中的位置。

公开(公告)号：US20170185182A1

公开(公告)日：2017-06-29

申请号：US14982349

申请日：2015-12-29

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Praveesh CHANDRAN ,  Lokesh Kumar KORAPATI ,  Mythreyi NAGARAJAN

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G02F1/133305 ,  G02F1/13338 ,  G06F3/0418 ,  G06F2203/04102

Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.

公开(公告)号：US20170038883A1

公开(公告)日：2017-02-09

申请号：US14816135

申请日：2015-08-03

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Mythreyi NAGARAJAN ,  Manivannan Ponnarasu

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F2203/04104

Abstract: An electronic device may include a touchscreen having an array of finger touch sensitive areas, and a controller coupled to the touchscreen. The controller is configured to read touch values from the array of finger touch sensitive areas, and determine when the read touch values define a valid single finger touch pattern having lower touch values within adjacent higher touch values, and, if so, treating the read touch values as being representative of a single finger touch, and, if not, causing a finger separation determination.

Abstract translation: 电子设备可以包括具有手指触摸敏感区域阵列的触摸屏和耦合到触摸屏的控制器。 控制器被配置为从手指触摸敏感区域的阵列读取触摸值，并且确定读取的触摸值何时定义在相邻较高触摸值内具有较低触摸值的有效的单个手指触摸模式，并且如果是，则对该读取触摸进行处理 值代表单个手指触摸，如果不是，则进行手指分离确定。