Patent ID: 10901557

Abstract:
System, method, and computer program product embodiments are provided that can support touch interaction on a projective capacitive (PCAP) display system in the presence of water contamination. According to an embodiment, a system includes a touchscreen coupled to a controller. The controller determines the presence of water contamination on the touchscreen, and obtains measurements during a mixed-mode measurement frame that includes a self-mode measurement and a mutual-mode measurement. Based on the measurements obtained, the controller determines a touch on the touchscreen in the presence of the water contamination on the touchscreen. In some embodiments, the self-mode measurement includes measurements collected at a both lower and a higher drive frequency, the higher drive frequency may be in the frequency range of 100 kHz to 500 kHz. In another embodiment, the self-mode measurement includes simultaneously measuring both horizontal-electrodes and vertical-electrodes.