Touch sensing apparatus

Abstract

A preferred embodiment of a touch sensing apparatus includes a plurality of sensing units (10), and a plurality of grounding lines (205). Each sensing unit includes an antenna (201), a controlling circuit, a detector (203), and a feedback line (204). The antenna is for receiving a noise of a user's finger. The controlling circuit preferably includes a diode (2021) and a capacitor (2022). The diode is for filtering out a static electrical signal of the user's finger and attenuating the noise, and the capacitor(2022) is for attenuating the noise from the diode. The detector is for converting the noise into a digital signal, and transmitting the digital signal to an MCU (Microprogrammed Control Unit) (206). The feedback line forms a positive feedback circuit with the antenna, thereby improving the accuracy of sensitivity of the sensing unit. The grounding lines are for insulating the sensing units.

Dependencies are inferred from the claim text.