Electronic pen having an ultrasonic wave controller

Details Electronic pen having an ultrasonic wave controller Electronic pen having an ultrasonic wave controller

2006-06-14

2010-11-30

Tran, My-Chau T (Department: 2629)

Telegraphy

Systems

Position coordinate determination for writing

C178S019010, C345S156000, C345S179000

Reexamination Certificate

active

07842893

ABSTRACT:
The present invention aims to provide an electronic pen that is able to prevent the reflection of an ultrasonic wave. An electronic pen according to the present invention has: a housing having a longitudinal axis and a write side tip along the longitudinal axis; at least an ultrasonic wave transmitter, the ultrasonic wave transmitter being arranged near the write side tip of the housing; and a controller for detecting a sensor orientation and for controlling transmission of the ultrasonic wave. The sensor orientation is an index that shows a rotational orientation of the housing about the longitudinal axis, the rotational orientation being directed at an ultrasonic wave sensor for receiving the ultrasonic wave that is transmitted from the ultrasonic wave transmitter. The controller selectively activates a part of the ultrasonic wave transmitter such that the ultrasonic wave is transmitted from the orientation which is directed to the sensor orientation.

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Chinese Office Action dated Aug. 3, 2007 with English translation.
Japanese Office Action dated Mar. 17, 2010 with a partial English translation thereof.

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