Abstract: A mobile phone is provided. The mobile phone comprises a touch panel, a camera, and a processor. The touch panel comprises a touch-sensitive display screen, implementing a plurality of virtual buttons. The camera comprises a camera lens having a view-finding area in relation to the touch panel. The processor, respectively coupled with the touch panel and the camera, switches on the camera in response to receipt of a trigger signal, determines whether a focus of the camera for a subject is shorter than a preset distance, and if so, locks the touch panel.

Abstract: A mobile phone is provided. The mobile phone comprises a touch panel, a camera, and a processor. The touch panel comprises a touch-sensitive display screen, implementing a plurality of virtual buttons. The camera comprises a camera lens having a view-finding area in relation to the touch panel. The processor, respectively coupled with the touch panel and the camera, switches on the camera in response to receipt of a trigger signal, determines whether a focus of the camera for a subject is shorter than a preset distance, and if so, locks the touch panel.

Abstract: An input method for use in an electronic device having a touch-sensitive screen is disclosed. The method comprises the following steps. An input signal is first received. Then, at least one control item corresponding to the specific program is displayed on the touch-sensitive screen in which the control item has a corresponding control area within the touch-sensitive screen. Next, it is determined whether a confirmation input signal inputted to the corresponding control area of the touch-sensitive screen is detected. A parameter of the control item is adjusted according to the confirmation input signal when the confirmation input signal has been detected.

Abstract: In an input method and an input system for an electronic device, an electronic device having input functionality and content displaying functionality, and a content displaying method and a displaying system for an electronic device, the electronic device is provided with a sensing screen, and the input method includes the following steps: displaying a plurality of virtual keys; receiving an input signal; displaying a corresponding enlarged virtual key on the sensing screen; and detecting whether there is an input of a confirm input signal, and outputting a virtual key code corresponding to the confirm input signal if affirmative.