Patent ID: 9746968
Date: 2017-08-29
CPC Classifications: G06F

Claim:
1. A method of detecting user initiated touch, the method comprising; sensing the user initiated touch via an electrode layer laid beneath a transparent touch screen having form lines laying in a same direction under the transparent touch screen and wherein the electrode layer comprises a plurality of electrodes laid in an x-axis direction; sensing the user initiated touch via an actuator layer laid beneath the electrode layer; sensing the user initiated touch via another electrode layer, the another electrode layer being laid beneath the actuator layer and comprising electrodes laid in a y-axis direction with respect to the x-axis direction; detecting the user initiated touch via a mutual capacitive detection and a multiple electrode actuation detection; providing touch detections to a host application from a processor based on at least one tactile command received and receiving tactile commands from the host application at the processor; providing high frequency capacitance-sensing excitation waveform data from the processor to a high frequency capacitance-sensing excitation waveform generator; providing control signals and low frequency actuator excitation waveform data from the processor to a low frequency actuator excitation multiple-waveform generator that is separate from the high frequency capacitance-sensing excitation waveform generator, and wherein the high frequency capacitance-sensing excitation waveform data and the low frequency actuator excitation waveform data are both provided for driving the y-axis direction electrodes; receiving an increased amount of electrical charge at one or more electrodes of the electrode layer at a location directly beneath where the user initiated touch was sensed, wherein the increased amount of electrical charge is received from the another electrode layer in response to the at least one tactile command; and providing a tactile surface responsive to the user initiated touch by locally raising a surface of the touch screen only at a position where the user initiated touch occurred responsive to receiving the increased amount of electrical charge and responsive to the at least one tactile command.