Pixart Imaging Incorporated

Raman Sahgal

Hsin-Chia Chen

Ren-Hau Gu

Jung-Tai Lin

Chung-Wen Lo

Tom Murphy

Ken Crandall

William Han

A physiological detection device including a light source, an image sensor and a processor is provided. The light source illuminates a skin surface using a burst mode. The image sensor receives ejected light from skin tissues under the skin surface at a sampling frequency to successively generate image frames. The processor controls the light source and the image sensor, and calculates a physiological characteristic according to the image frames captured when the light source is illuminating light. The physiological detection device reduces the total power consumption by adopting the burst mode.

Physiological detection device

Physiological detection device and operating method thereof

There is provided a concurrent driving capacitive touch sensing device including a drive end, a capacitive sensing matrix and a detection end. The capacitive sensing matrix includes a plurality of drive electrodes and sense electrodes crossing to each other. The drive end is configured to concurrently input cycle data of encoded and modulated drive signals into the drive electrodes. The detection end is coupled to one of the sense electrodes and configured to acquire a predetermined number of sampled values corresponding to the cycle data associated with the coupled sense electrode and generate a response signal to the drive end according to the sampled values, wherein the drive end resends the cycle data according to the response signal.

Concurrent driving capacitive touch sensing device capable of resending drive signals

There is provided a capacitive touch system including a gain control unit sequentially receiving a plurality of digital detected signals of a detection frame. The gain control unit includes a gain buffer and a control circuit. The gain buffer is configured to store a current gain sheet. The control circuit calculates a first gain sheet according to a setpoint and the digital detected signals of the detection frame, compares a current roughness of the current gain sheet with a first roughness of the first gain sheet and replaces the current gain sheet in the gain buffer by the first gain sheet when the first roughness is flatter than the current roughness.

Capacitive touch system and gain control method thereof

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Santa Clara, CA, United States of America

Raman Sahgal