公开(公告)号：US09703433B2

公开(公告)日：2017-07-11

申请号：US14461977

申请日：2014-08-18

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Praveesh Chandran ,  Baranidharan Karuppusamy ,  Giuseppe Noviello ,  Chee Weng Cheong ,  Leonard Dinu ,  Dianbo Guo ,  Kien Beng Tan ,  Chaochao Zhang

IPC: G06F3/045 ,  G06F3/044 ,  G06F3/0354 ,  G06F3/038 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/03545 ,  G06F3/0383 ,  G06F3/0416

Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.

公开(公告)号：US09454272B2

公开(公告)日：2016-09-27

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。 接收所发射的无线信号的导体将信号提供给如在每个导体处接收的无线信号的滤波，放大和数字化的电路。 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。