Pixart Imaging Incorporated

Adaptec, Inc.

Jeffrey Stone

Michael John Brosnan

Vitali Souchkov

Kenneth C Crandall

Thomas Patrick Murphy

Jeffrey Braun Doar

Bahareh Ghaffari

Abhay Kumar Rai

Sam Sen Li

Zachary Dietz

Disclosed herein are various embodiments of a capacitive touchscreen system that is capable of sensing finger touches made on a capacitive touchscreen according to various scanning modes that reduce power consumption of the capacitive touchscreen system. The disclosed power saving scanning modes are modally focused, and can be used not only to reduce system power consumption, but also to enhance the user experience with the capacitive touchscreen system.

Capacitive touchscreen system with reduced power consumption using modal focused scanning

Disclosed are capacitive touchscreen or touch panel systems, devices and methods which increase the dynamic range of touches that may be detected on a capacitive touch screen or touch panel. Increased dynamic range is provided by employing automatic gain control methodologies and circuitry to process signals corresponding to individual mutual capacitance cells in a touch screen or touch panel.

Automatic gain control for capacitive touch panel sensing system

Various embodiments of charge pump circuitry configured to generate output signals having first distortion signals superimposed thereon are disclosed. Demodulator input signals are also disclosed that have second distortion signals superimposed thereon. A synchronization signal is delivered to demodulator circuitry through at least first and second integer divider circuits and to charge pump circuitry through at least the first integer divider circuitry such that the first and second distortion signals have frequencies that are integer divisions of the synchronization frequency.

Charge pump frequency selection in touch screen sensor interface system

The present invention is directed to the synchronous control of a parallel interface. In particular, the present invention provides an interface between a serial communication link and parallel communication channels within an adapter that operate synchronously, and without requiring a data buffer. A data buffer may be provided between the parallel data channels of the adapter that operate synchronously with the serial data channel, and the adapter's host interface. The present application reduces the amount of memory that must be provided by the adapter, and eliminates delays caused by the provision of additional data buffers.

Method and apparatus for the synchronous control of a serial interface

Growing community of inventors

Fort Collins, CO, United States of America

Jeffrey Stone