Abstract: A variable stiffness screen with a pneumatic frame for wearable electronic devices provides a viewable area that can be adjusted by managing the screen's physical properties. The screen incorporates a flexible electronic display, attached to a pneumatic frame, in which the structural properties can be changed from a flexible state to a rigid one to control the stiffness of the display.

Abstract: A personal digital device comprises a variable stiffness screen capable of varying its display size by managing its stiffness, and a body carrying means for wireless communication and for storing and processing information. The functional flexibility of the screen allows for creating an adjustable visual interface between the user and the device: with the screen inside the device for compact storage, and with the screen extended to display high-quality graphics and images. In some particular embodiments the device incorporates a detachable audio unit allowing configuration of the user audio interface depending on the specifics of usage.

Abstract: A variable stiffness screen for wearable electronic devices provides a viewable area that can be adjusted by managing the screen's physical properties. The screen incorporates a flexible electronic display, attached to a structural system, in which the physical properties can be changed from a flexible state to a rigid one to control the stiffness of the display.

Abstract: An adjustable headphone comprising a pair of self-adjusting earpieces interconnected by a headpiece that includes a stiff resilient headband assembly and a soft flexible headstrap resting against a wearer's head. The headstrap is anchored at least at one end to a corresponding sliding block movably joined with the headband assembly having a bifurcated gear rack on its inner surface. The sliding block is equipped with at least one spring-loaded detent coming in contact with the gear rack. The headband assembly forms with at least one earpiece a hollow ball-and-socket joint where the spherical driver cup works as a ball part of the joint, and it mates to the arm's inner spherical surface which is a socket part of the joint. This joint provides the earpiece substantial angular motion in all directions thus enabling it to adjust to any ear shape.

Abstract: An adjustable headphone comprising a pair of self-adjusting earpieces interconnected by a headpiece that includes a stiff resilient headband assembly and a soft flexible headstrap resting against a wearer's head. The headstrap is anchored at least at one end to a corresponding sliding block movably joined with the headband assembly having a bifurcated gear rack on its inner surface. The sliding block is equipped with at least one spring-loaded detent coming in contact with the gear rack. The headband assembly forms with at least one earpiece a hollow ball-and-socket joint where the spherical driver cup works as a ball part of the joint, and it mates to the arm's inner spherical surface which is a socket part of the joint. This joint provides the earpiece substantial angular motion in all directions thus enabling it to adjust to any ear shape.