Abstract: Disclosed is a smart phone/tablet computer capable of displaying and operation on front and rear sides or on multiple sides, including a main body. The main body has a front side and a rear side that are respectively provided with a first displaying/operating unit and a second displaying/operating unit. The main body has a further side electrically connected to at least one third displaying/operating unit. The main body includes a control unit, which enables a signal to displaying, in a synchronous or non-synchronous manner, on each of the first, second, and third displaying/operating units. The control unit includes an image processing section and at least one detachable third displaying/operating unit electrically connected thereto. After a signal has been processed by the image processing section, the first displaying/operating unit, the second displaying/operating unit, and the third displaying/operating unit are enabled to displaying one of a color signal and a grey-scale signal.

Abstract: The present invention provides a portable electronic device having dual displays provided on front and rear surfaces thereof and for operations thereon, comprising a housing, a first display operation unit, a second display operation unit and a control unit; the housing having a front surface and a rear surface; the first and second display operation units provided on the front and rear surface of the housing respectively; and the control unit provided inside the housing and electrically connected to the first and second display operation units for transmitting signals and switching the first and second display operation units to synchronous and asynchronous display modes; and wherein the housing comprises two individual components pivotally attached to each other such that they can be rotated to show their respective front surfaces to realize the design of dual displays and to facilitate various control operations on the dual displays adapted for diverse applications.

Abstract: A keyboard device for a personal digital assistant (PDA) includes first and second casing members that are pivotally interconnected, and a keyboard module mounted on inner surfaces of the casing members. The inner surface of one of the casing members further has a support frame for adjustably supporting the PDA. A connector unit on the support frame connects electrically the PDA to the keyboard module.

Abstract: A keyboard device for a personal digital assistant (PDA) includes first and second casing members that are pivotally interconnected, and a keyboard module mounted on inner surfaces of the casing members. The inner surface of one of the casing members further has a support frame for adjustably supporting the PDA. A connector unit on the support frame connects electrically the PDA to the keyboard module.

Abstract: A collapsible keyboard includes left and right subframes hinged to each other at proximate lateral sides by a hinge member. The hinge member includes a mounting member with front and rear mounting portions pivoted to the subframes, two wing members hinged to lateral edges of the mounting member, and couplers disposed to link the subframes and the wing members. As such, the subframes are turnable between deployed and collapsed positions, where the subframes are planar and face towards each other, respectively. A locking mechanism is disposed over the proximate lateral sides of the subframes to lock the subframes in the deployed position.