Patent ID: 9285889
Filing Date: 2016-03-15
CPC Classification: G06F,H03K

Claim Text:
1. An apparatus comprising: a first electrode to transmit a signal; and at least one second electrode to receive the signal, wherein: the first electrode to transmit the signal is located on a first level of a keyboard assembly, a second electrode to receive the transmitter signal is located on a second level of the keyboard assembly, the second level being different than the first level, transmission of the signal from the first electrode to the second electrode is to generate an electric field within a first detecting zone above at least one key of the keyboard assembly between the first and second electrodes, the electric field to be generated within the first detecting zone above the keyboard assembly based on a distance between the first electrode on the first level and the second electrode on the second level, wherein: the second electrode to receive the transmitter signal is located adjacent at least one key of the keyboard assembly, and the first electrode to transmit the transmitter signal is located at least partially under the at least one key and the second electrode, wherein the first electrode to transmit the transmitter signal is at a metal support plate of the keyboard assembly and the second electrode to receive the transmitter signal is at a printed circuit board of the keyboard assembly above the support plate.