Patent ID: 7278224
Filing Date: 2007-10-09
Classification: G01B,H04M

Abstract:
1. A portable electronic device selectively working at a voice-adjusting mode and a length-measuring mode, comprising: a casing having a casing surface; a display unit disposed on the casing surface; a roller rotatably disposed on the casing surface with a portion of the roller being exposed outside the casing, wherein when the portable electronic device works at the voice-adjusting mode, the roller is for adjusting the voice of the portable electronic device, and when the portable electronic device works at the length-measuring mode, the roller touching a surface and then rotating on the surface to measure a length; an encoder disposed inside the casing for outputting a pulse number according to the rotation turn of the roller when the portable electronic device moves with respect to the surface; and a controller disposed inside the casing and electrically connected to the display unit and the encoder, wherein the controller controls the portable electronic device to selectively work at the voice-adjusting mode and the length-measuring mode, the controller receives the pulse number and then determines a length value accordingly, and the controller controls the display unit to display the length value.