Abstract: A vertical memory device includes a substrate including a cell array region and a staircase region surrounding the cell array region, gate electrodes on the cell array region and the staircase region, and a channel on the cell array region. The gate electrodes are isolated from each other in first and third directions and each extend in a second direction. The channel extends in the first direction through one or more gate electrodes. End portions in the second direction of first gate electrodes of the plurality of gate electrodes define first steps in the second direction and second steps in the third direction on the staircase region of the substrate, the second steps being connected to the first steps, respectively, at same levels.

Abstract: A vertical memory device includes a substrate including a cell array region and a staircase region surrounding the cell array region, gate electrodes on the cell array region and the staircase region, and a channel on the cell array region. The gate electrodes are isolated from each other in first and third directions and each extend in a second direction. The channel extends in the first direction through one or more gate electrodes. End portions in the second direction of first gate electrodes of the plurality of gate electrodes define first steps in the second direction and second steps in the third direction on the staircase region of the substrate, the second steps being connected to the first steps, respectively, at same levels.

Abstract: A wearable device that may transform between an annularly bent state and a flat state is provided. The wearable device includes a plurality of segment members including a top portion and a bottom portion having a shorter length than the top portion; a plurality of connecting members that are disposed to correspond to the plurality of segment members, wherein each of the plurality of connecting members is connected to be mutually rotatable with two segment members disposed respectively on both sides thereof; a bistable spring that is supported on a plurality of segment members to provide elasticity in a direction into the annularly bent state and retentivity of the flat state; and a flexible display device that is supported on the top portion of the plurality of segment members.

Abstract: A wearable device that may transform between an annularly bent state and a flat state is provided. The wearable device includes a plurality of segment members including a top portion and a bottom portion having a shorter length than the top portion; a plurality of connecting members that are disposed to correspond to the plurality of segment members, wherein each of the plurality of connecting members is connected to be mutually rotatable with two segment members disposed respectively on both sides thereof; a bistable spring that is supported on a plurality of segment members to provide elasticity in a direction into the annularly bent state and retentivity of the flat state; and a flexible display device that is supported on the top portion of the plurality of segment members.

Abstract: Disclosed herein is an apparatus for opening and closing a portable terminal. The apparatus includes a second cam, which has an upper rib to be latched with the upper portion of the housing and a lower rib to be latched with the bottom of the housing, thereby providing structural stability. In addition, frictional wear and noise can be suppressed while the second cam moves, thereby improving the service life and reliability of the device.

Abstract: Disclosed herein is an apparatus for opening and closing a portable terminal. The apparatus includes a second cam, which has an upper rib to be latched with the upper portion of the housing and a lower rib to be latched with the bottom of the housing, thereby providing structural stability. In addition, frictional wear and noise can be suppressed while the second cam moves, thereby improving the service life and reliability of the device.

Abstract: Disclosed herein is a slide-up opening and closing apparatus for a communications terminal. The apparatus includes a slider unit, a slider assembly and an angular positioning member in order to open a slider body with respect to a main body. With the apparatus, the slider body can be opened with a desired inclination against the main body and after a certain degree of opening, automatically complete its opening operation without any further force or action, thereby providing a convenient use. In addition, the slider body can be opened with freedom without interference by the main body. Further, when the slider body is opened, most of the top face of the main body can be exposed, thereby providing a convenience of use.

Abstract: Disclosed is a display tilting mechanism for a communication terminal, in which a display is rotatably connected to a supporter hingedly pivoting on a main body of the communication terminal. The mechanism includes a fixing unit fixedly installed in the supporter. A rotating unit is connected with the display and rotatably installed relative to the fixing unit. A supporting unit is connected with the fixing unit in such a way that the rotating unit is not released when it rotates on the fixing unit. A retaining unit is provided for holding the rotating unit in place at the initial state and rotated state thereof when rotated on the fixing unit. Thus, when watching a movie or the like, the image can be display in a normal orientation.

Abstract: Disclosed is a slider mechanism for slidably opening and closing a portable communication terminal. The slider mechanism includes a first plate and a second plate slidably combined with the first plate. The second plate has a cam profile formed along siding direction. A resilience unit is mounted on the first plate to exert resilient force perpendicularly to moving direction of the second plate. A roller is rotatably attached to an end of the resilience unit. The roller runs along the cam profile while the portable terminal opens or closes. Formed at a desired position of the cam profile is a depression on which the roller rests to hold the terminal in place at closed or opened state, or at any other desired position.

Abstract: Disclosed is a hinge mechanism of portable phone having an advanced configuration, which can perform the opening operation and the rotating operation of a phone cover. The hinge mechanism comprises a housing to connect a phone body and a phone cover, which has a rotary chamber and a hinge chamber, a hinge part to open and to close he phone cover, which is disposed in the hinge chamber, and a rotary part to rotate the phone cover, which is disposed in the rotary chamber. A user can play a game or watch a motion picture using the portable phone while looking at the liquid crystal display of the phone cover, because the phone cover can be rotated.

Abstract: Disclosed hinge assemblies and portable terminals having the same. According to a first embodiment of the present invention, a hinge assembly, a first member is fixed to a side of one article so as to support the one article to horizontally rotate with respect to the other article. A second member is fixed to a side of the other article and engaged with the first member in order to support the other article so that the one article can rotate with respect to the other article. A third member provides the second member with elasticity in order for the first member is tightly engaged with the second member.

Abstract: Disclosed is a hinge mechanism of portable phone having an advanced configuration, which can perform the opening operation and the rotating operation of a phone cover. The hinge mechanism comprises a housing to connect a phone body and a phone cover, which has a rotary chamber and a hinge chamber, a hinge part to open and to close he phone cover, which is disposed in the hinge chamber, and a rotary part to rotate the phone cover, which is disposed in the rotary chamber. A user can play a game or watch a motion picture using the portable phone while looking at the liquid crystal display of the phone cover, because the phone cover can be rotated.

Abstract: Disclosed is a hinge device of a portable wireless terminal. The portable wireless terminal includes a first housing, a second housing rotatably coupled to the first housing in such a manner that the second housing moves away from the first housing or approaches the first housing according to a rotational movement thereof, a first hinge axis extending parallel to an upper surface of the first housing, and a second hinge axis extending perpendicular to the upper surface of the first housing and providing a rotational center for the first hinge axis. The first and second hinge axes act as rotational axes of the second housing when the second housing rotates with respect to the first housing.

Abstract: Disclosed is a hinge device of a portable wireless terminal. The portable wireless terminal includes a first housing, a second housing rotatably coupled to the first housing in such a manner that the second housing moves away from the first housing or approaches the first housing according to a rotational movement thereof, a first hinge axis extending parallel to an upper surface of the first housing, and a second hinge axis extending perpendicular to the upper surface of the first housing and providing a rotational center for the first hinge axis. The first and second hinge axes act as rotational axes of the second housing when the second housing rotates with respect to the first housing.