Method of transmitting transmission data from sensor controller to pen, and pen

Abstract

A method is provided for transmitting transmission data from a sensor controller that detects a pen to the pen through a sensor electrode group. The pen includes a pen tip electrode arranged near a pen tip, and an analog circuit that detects edges of a signal led to the pen tip electrode. The pen also includes a digital circuit that performs a correlation operation of an output signal of the analog circuit and known patterns to detect the transmission data. The sensor controller is configured to generate a pulse signal representing the transmission data. The sensor controller is configured to transmit the pulse signal, by using a main signal and a sub signal of the pulse signal so as to enhance the edges, thereby transmitting the transmission data through the sensor electrode group.

Dependencies are inferred from the claim text.