Input method and electronic device using pen input device

#The present disclosure relates generally to input technology for electronic devices using a pen input device.

#Today's hand held electronic devices such as smart phones, tablets computers, and the like, receive a user's input through various input methods and devices. In particular, the touch screen has become the predominant input mechanism in a majority of devices. Touch screen applications that have recently gained in popularity include handwriting and painting applications in which detection of a user's touch across the touch screen surface is converted to a writing or an image. In these applications, methods and devices for a touch input using a tool instead of the user's finger have been steadily researched and developed in order to allow a more delicate input.

#Currently, sophisticated pen input devices which include communication and detection electronics have been proposed for use as a touch input tool. Various techniques have been attempted to measure three dimensional coordinates of these pen input devices by combining an acceleration sensor, an optical sensor, etc. within the pen input device. The coordinates are then used to express the thickness or pressure of a pen input on the basis of measurement results.

#FIG. 1 is a block diagram illustrating the configuration of an electronic device in accordance with an embodiment of the present invention.

#FIG. 2 is a block diagram illustrating the configuration of a pen input device in accordance with an embodiment of the present invention.

#FIG. 3 illustrates two examples of expressing various effects by using a real pencil, to illustrate concepts of the present disclosure.

#Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, the disclosed embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The principles and features of this invention may be employed in varied and numerous embodiments without departing from the scope of the invention.

#Furthermore, well known or widely used techniques, elements, structures, and processes may not be described or illustrated in detail to avoid obscuring the essence of the present invention. Although the drawings represent exemplary embodiments of the invention, the drawings are not necessarily to scale and certain features may be exaggerated or omitted in order to better illustrate and explain the present invention.

#In this disclosure, “status information” may include all kinds of information detected at a sensor unit of a pen input device, especially, including one or more of three-dimensional coordinate information, tilt information, direction information, pressure information, and acceleration information of the pen input device.