PRESSURE SENSOR FOR A STYLUS

摘要

A pressures sensor for sensing pressure on a tip of a stylus includes a variable capacitor, a power supply, and a capacitance measuring unit. The variable capacitor includes a first electrode coated with solid dielectric layer, a second electrode formed at least in part with elastic material, and a support element that moves together with the tip of the stylus and presses against the second electrode in response to pressure applied on the tip. A portion of the dielectric layer is patterned with a conductive pad that is exposed and the second electrode contacts the conductive pad patterned on the dielectric layer. The power supply and the capacitance measuring unit establish electrical connection with the second electrode via the conductive pad.

主权项

1. A pressure sensor for sensing pressure on a tip of a stylus, the pressure sensor comprising:
a variable capacitor comprising:
a first electrode coated with solid dielectric layer, wherein a portion of the dielectric layer is patterned with a conductive pad that is exposed;a second electrode formed at least in part with elastic material,wherein the second electrode contacts the conductive pad patterned on the dielectric layer; anda support element that moves together with the tip of the stylus and presses against the second electrode in response to pressure applied on the tip; a power supply; and a capacitance measuring unit, wherein the power supply and the capacitance measuring unit establish electrical connection with the second electrode via the conductive pad.