Stylus Pen Spherical Tip Minimizes Tilt Offset

The patent employs a spherical stylus tip instead of a conventional flat or pointed tip. This spherical geometry ensures that the capacitance change remains consistent regardless of the tilt angle, as the curved surface maintains a relatively uniform distance from the touch sensor across different orientations. This resolves the contradiction by enabling accurate tilt compensation while preserving touch sensitivity through the optimized spherical shape.

The patent optimizes the diameter of the conductive member to 1 mm or less, representing a significant reduction from conventional designs. This parameter change minimizes the capacitance change caused by tilting, thereby reducing tilt offset. Simultaneously, the conductive member is positioned strategically within the stylus body to maintain adequate distance from the grip part, ensuring that touch sensitivity is not compromised despite the reduced diameter.

The spherical stylus tip with optimized curvature radius provides consistent capacitance coupling with the touch sensor across various tilt angles. This curved geometry ensures that even with a reduced conductive member diameter of 1 mm or less, the touch sensitivity is maintained because the spherical surface maintains effective electrical coupling with the sensor plane.

The patent creates an optimized replica of the conventional stylus design by implementing a spherical tip geometry that replicates and improves upon traditional contact mechanisms. This spherical copying approach allows the reduced-diameter conductive member to achieve both precise contact point detection and adequate touch sensitivity that conventional designs cannot simultaneously provide.