Method for inputting character

[0025]FIG. 2 is a flowchart illustrating a method for inputting a character according to a first embodiment of the present invention. Referring to FIG. 2, first, at step S210, a system of a handheld electronic device sets a reference plane serving as a reference basis in determining whether the handheld electronic device is tilted or not. According to an aspect of the embodiment, the reference plane for example is a front surface, a back surface of the handheld electronic device, or any plane parallel therewith. For example, FIG. 3 is a schematic diagram illustrating a reference plane according to the first embodiment of the present invention. Referring to FIG. 3, there is shown a reference plane which is selected to be a front surface of the handheld electronic device. A central point of the reference plane is designated as an origin, and x axis, y axis, and z axis are set up according to the origin. The x axis represents a horizontal direction of the held handheld electronic device.

[0039]FIG. 7 is a flowchart illustrating a method for inputting a character according to a second embodiment of the present invention. Referring to FIG. 7, firstly, at step S710, a system of a handheld electronic device determines a reference plane serving as a reference basis in determining whether the handheld electronic device is tilted or not. According to an aspect of the embodiment, the reference plane for example is a front surface, a back surface of the handheld electronic device, or any plane parallel therewith.

[0040]Then, at step S720, when a certain key of a keypad of the handheld electronic device is pressed, a tilting angle and a tilting direction of the handheld electronic device are detected.

[0041]It should be noted that, the second embodiment according to the present invention differs from the first embodiment in that when the key keeps pressed and at the same time the step S720 is performed to tilt the handheld electronic device to a corresponding direction according t