Method and apparatus for stroke acquisition and ultrasonic electronic stylus

摘要

A method and apparatus for stroke acquisition, and an ultrasonic electronic stylus are provided. The method is applied to the ultrasonic electronic stylus. In the case that the ultrasonic electronic stylus contacts with a writing board and a pressure generated on the writing board by the ultrasonic electronic stylus reaches a first predetermined value, the ultrasonic electronic stylus is controlled to generate a first signal so that a signal receiver of an electronic device acquires a first stroke based on the first signal. After the first signal is generated, an operation parameter of the ultrasonic electronic stylus is adjusted. In the case that the pressure is smaller than the first predetermined value and a preset condition is satisfied, a second signal is generated so that the electronic device continues to acquire a second stroke based on the second signal.

主权项

1. A method for stroke acquisition, applied to an ultrasonic electronic stylus, wherein the ultrasonic electronic stylus is adapted to write on a writing board, a pressure sensor is provided at a nib of the ultrasonic electronic stylus, the method comprises:
in the case that the ultrasonic electronic stylus contacts with the writing board, detecting whether a pressure generated on the writing board by the ultrasonic electronic stylus reaches a first predetermined value, and in the case that the pressure generated on the writing board by the ultrasonic electronic stylus reaches the first predetermined value, controlling the ultrasonic electronic stylus to generate a first signal, so that a signal receiver of an electronic device receives the first signal and acquires, based on the first signal, a first stroke generated by the ultrasonic electronic stylus on the writing board; adjusting an operation parameter of the ultrasonic electronic stylus after the first signal is generated, wherein the operation parameter comprises a threshold of the pressure sensor and/or a duration of a generated signal; and in the case that the pressure generated on the writing board by the ultrasonic electronic stylus is smaller than the first predetermined value, judging whether a preset condition is satisfied and controlling the ultrasonic electronic stylus to continue to generate a second signal if the preset condition is satisfied, so that the electronic device continues to acquire a second stroke based on the second signal.