Title:
【発明の名称】改良されたペンポジショニングシステム
Document Type and Number:
Japanese Patent JP2002509317
Kind Code:
A
Abstract:
A pen positioning system is provided, in which a pen, having multiple output elements, is adapted to accurately determine the location of the pointing tip of the pen, in relation to an electronic tablet. The output elements, preferably ultrasonic transmitters having distinct frequencies, are located a fixed distance from each other, and are also related in space to the pointing tip of the pen. The geometric relationship between the output elements and the pointing tip of the pen allows the location of the pointing tip to be determined, independent of the angle which the pen is inclined against the surface of the writing tablet. A detection system is used to receive the output signals from the output elements, isolate the output signals from each other, and process them independently to determine the location of the output elements and of the pointing tip of the pen. Alternative embodiments include an additional output element on a pressure sensitive shell of the pen, which allows the pen to accurately provide pressure sensitive output signal information.
Inventors:
Ward Daniel Earl
Wood robert pee
Harrel Jacob
Holtzmann Raffy
Wood robert pee
Harrel Jacob
Holtzmann Raffy
Application Number:
JP2000540518A
Publication Date:
March 26, 2002
Filing Date:
December 03, 1998
Export Citation:
Assignee:
Electronics For Imaging Incorporated
International Classes:
G06F3/0354; G06F3/043; G06K11/06; (IPC1-7): G06F3/03; G06K11/18
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)