US 10108277

Here is a concise summary of US patent 10108277:

• Title: Pointer, position detection apparatus and position detection method
• Assignee: Wacom Co Ltd
• Inventors: Yasuo Oda, Sadao Yamamoto, Yoshihisa Sugiyama
• Filing Date: February 18, 2016
• Issue Date: October 23, 2018
• Abstract: The patent describes an electrostatic coupling type position detection apparatus designed to detect not only the pointer's position but also other information such as pressure or side switch activation. The pointer transmits two codes, with the time difference between them corresponding to the pressure applied to the pen tip. The position detector performs a correlation matching operation between signals received from its conductors and correlation calculation codes corresponding to the two transmitted codes. This allows the apparatus to detect the pointer's position based on at least one of the codes, and to detect the applied pressure based on the time difference between the two codes from the correlation matching operation result.

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