Pixart Imaging Incorporated

Zhi Zhong Huang

Mercedes E Gil

Jerome D Wong

Xiao Yan Zheng

Xu Zhang

Various embodiments of a low-power-consumption analog-to-digital converter ('ADC') for a touchscreen or touch panel in a capacitive sensing system are disclosed. The ADC is configured to operate in a first mode or a second mode. The first mode is characterized by a first resolution having a first number of ADC bits and a first level of power consumption associated therewith. The second mode is characterized by a second resolution having a second number of bits and a second level of power consumption associated therewith. The ADC operates under control of the controller and is configured such that the first number of bits is greater than the second number of bits and the first power level is greater than the second power level. The controller causes the ADC to switch from operating in the first mode to operating in the second mode when low radio frequency (RF) noise conditions are detected by sense circuitry, the ADC and/or the controller.

Growing community of inventors

Pudong, China

Zhi Zhong Huang