Abstract: A display device according to one or more embodiments of the present invention includes: a flexible display panel that is configured to be widened or narrowed, the flexible display panel including a display part configured to display an image at a first surface of the flexible display panel, and a bending part configured to be folded in a direction away from the display part; and a driving unit including one or more rollers in close proximity to the bending part, and configured to rotate to widen or narrow the flexible display panel.

Abstract: Described herein are printable structures and methods for making, assembling and arranging electronic devices. A number of the methods described herein are useful for assembling electronic devices where one or more device components are embedded in a polymer which is patterned during the embedding process with trenches for electrical interconnects between device components. Some methods described herein are useful for assembling electronic devices by printing methods, such as by dry transfer contact printing methods. Also described herein are GaN light emitting diodes and methods for making and arranging GaN light emitting diodes, for example for display or lighting systems.

Abstract: Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities.

Abstract: Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities.

Abstract: Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities.

Abstract: A wearable mobile device and a method of detecting a biosignal with a wearable mobile device are provided. A method of detecting a biosignal with a wearable mobile device involves determining whether a wearable mobile device is closely attached to a user; and providing a biosignal-based service in response to the wearable mobile device being determined to be closely attached to the user.

Abstract: A key apparatus of an electronic device is provided. The key apparatus includes a housing having a cylindrical portion, the cylindrical portion including an upper portion and a lower portion, the upper portion and the lower portion being open, a knob including a circular-plate portion, the circular plate portion having a concavo-convex portion, the concavo-convex portion including a concave portion and a convex portion arranged alternately in a circular shape and an extension portion extended from the circular-plate portion in a downward direction and inserted into a hollow of the cylindrical portion, and the knob moves on the circular-plate portion, an anti-deviation unit configured to prevent the knob from being deviated from the cylindrical portion, an elastic configured to elastically press the concavo-convex portion at a lower side of the circular-plate portion, and a switch connected to the extension portion and switches over movement of the extension portion is delivered.

Abstract: Provided are a head having improved usability by limiting a movement range of a laser spot and an atomic force microscope having the same. A head according to an exemplary embodiment of the present disclosure is a head measuring bending of a cantilever by using a laser beam reflected on the surface of the cantilever in order to acquire information on a sample surface by using a tip of the cantilever. The head includes: a spot moving means configured to move a laser spot so as to position the laser spot on the surface of the cantilever; and a movement limiting means configured to limit a movement range of the laser spot moved by the spot moving means in a predetermined range.

Abstract: Described herein are printable structures and methods for making, assembling and arranging electronic devices. A number of the methods described herein are useful for assembling electronic devices where one or more device components are embedded in a polymer which is patterned during the embedding process with trenches for electrical interconnects between device components. Some methods described herein are useful for assembling electronic devices by printing methods, such as by dry transfer contact printing methods. Also described herein are GaN light emitting diodes and methods for making and arranging GaN light emitting diodes, for example for display or lighting systems.

Abstract: A measurement method in which a sensing unit acquires surface data of a measurement target while scanning the surface of the measurement target and at least one of the sensing unit and the measurement target is moved in order for the sensing unit to scan the surface along a plurality of fast scan lines on the surface of the measurement target, includes: a first step in which the sensing unit scans a surface along any one fast scan line of the plurality of fast scan lines to acquire the surface data along the any one fast scan line; and a second step in which the sensing unit acquires a surface data along a fast scan line most adjacent to the any one fast scan line while at least one of the sensing unit and the measurement target is moved along the most adjacent fast scan line, after the first step.

Abstract: Provided is a flexible display apparatus defined by a folding area configured to be folded with respect to a folding axis extending in one direction, a non-folding area adjacent the folding area, a display area, and a non-display area adjacent the display area, the display apparatus including a touch screen panel, a window layer on a top surface of the touch screen panel, and including a flat section overlapping the display area, and having a first thickness, and a curvature section extending from the flat section, overlapping the folding area and the non-display area, and having a thickness that gradually decreases away from the flat section, and a cushion layer on a bottom surface of the touch screen panel.

Abstract: A Dynamic Voltage and Frequency Scaling (DVFS) method, comprising of a scheduling execution of DVFS to adjust frequency or voltage of a target device at a first scheduled time; monitoring operating frequency of the target device; and selectively deferring execution of DVFS at a later scheduled time based on the operating frequency of the target device; wherein execution of DVFS at a next scheduled time is deferred when the operating frequency of the target device is below a given minimum frequency.

Abstract: A stretchable display device, including a stretchable display panel to display images; and a window on a touch sensing layer, the window including a soft part and a plurality of hard parts attached on a surface of the soft part, the hard parts including an attachment portion attached to the soft part and a non-attachment portion not attached to the soft part.

Abstract: Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities.

Abstract: A first semiconductor device equalizes levels of a bit line and a complementary bit line of a high-order bit line pair in a first memory block using a first drive voltage signal whose level is controlled when a power-down mode or a self-refresh mode is activated according to a level combination of high-order command/address signals. A second semiconductor device equalizes levels of a bit line and a complementary bit line of a low-order bit line pair in a second memory block using a second drive voltage signal whose level is controlled when the power-down mode or the self-refresh mode is activated according to a level combination of low-order command/address signals.