POWER MANAGEMENT FOR TOUCH CONTROLLER

摘要

Power management for a touch controller is disclosed. The touch controller can include a transmit section for transmitting stimulation signals to an associated touch sensor panel to drive the panel, where the touch controller can selectively adjust the transmit section to reduce power during the transmission. The touch controller can also include a receive section for receiving touch signals resulting from the driving of the panel, where the touch controller can selectively adjust the receive section to reduce power during the receipt of the touch signals. The touch controller can also include a demodulation section for demodulating the received touch signals to obtain touch event results, where the touch controller can selectively adjust the demodulation section to reduce power during the demodulation of the touch signals. The touch controller can also selectively reduce power below present low levels during idle periods. The touch controller can be incorporated into a touch sensitive device.

主权项

1. A method for selectively lowering power consumption of a touch controller device for a touch screen, the touch screen having lines for applying a stimulation signal to capacitive sensing nodes of the touch screen, the method comprising:
determining an operating condition of the touch controller device; selecting one or more components of the touch controller device, and for each selected component, selecting from a plurality of values, a value associated with the component of the device, wherein the component and corresponding value selected is based on the determined operating condition of the touch controller device; adjusting the one or more selected components with the corresponding selected value such that less power is consumed during the determined operating condition of the touch controller device; and wherein the operating condition comprises a frequency of the stimulation signal.