Panasonic Corporation

Tatsuhito Ueno

Yuuji Toyomura

Toshihito Tanaka

Yasuhiro Tasaka

Yasunobu Hayashida

Kazuhisa Sakamoto

Taichi Yamada

Toshiyuki Ogawa

Masami Hirakawa

An electronic pen transmits pen information to a controller corresponding to detection of a touch condition, and thereafter turns ON a connecting switch that disconnects electrical connection between the tip portion and the grip portion of the pen that are provided in a state of being electrically disconnected from each other so as to cause a pen input acceptance state. The controller determines that position detection information is from the electronic pen when the position detection information is received from a position detecting device after the pen information is received from the electronic pen, while the controller determines that position detection information is from a finger when the position detection information is received from the position detecting device without receiving the pen information from the electronic pen.

Electronic pen system

A touch screen device includes a panel body having electrodes arranged in a grid pattern; a sensitivity calculator configured to calculate a sensitivity for each electrode intersection based on an amount of change in a signal output from the electrodes in response to a touch operation; a touch position detector configured to detect the touch position based on the sensitivity obtained by the sensitivity calculator; and a pointing device determiner configured to correct the sensitivity obtained by the sensitivity calculator, based on the touch position obtained by the touch position detector, and to determine whether a pointing device performing the touch operation is a pen or a finger, based on the corrected sensitivity.

Touch screen device

Growing community of inventors

Fukuoka, Japan

Tatsuhito Ueno