Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.

Abstract: A modified conjugated diene-based polymer having high linearity and improved compounding properties is provided. The modified conjugated diene-based polymer includes phosphor, sulfur and chlorine in specific amount ranges, and the degree of branching is controlled, and accordingly, if applied to a rubber composition, tensile strength and viscoelasticity may be excellent, and processability may be markedly improved.

Abstract: The present invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of the multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.

Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.

Abstract: A portable electronic device is provided, including a first body, which has a display screen, a second body, which is slidably connected to the first body, and a door unit, which opens and closes a battery compartment disposed between the first and second bodies, in which the door unit is concealed and made externally visible according to the position of the second body relative to the first body, and in which the door unit can be opened and closed when it is externally visible.

Abstract: A memory card slot door unit selectively opens and closes an entrance of a memory card slot used in a digital mobile apparatus. The memory card slot door unit includes a door for closing an entrance of a memory card slot. A plurality of hinges supporting a pivoting motion of the door against lateral walls of the memory card slot, so that the door selectively opens and closes the entrance of the memory card slot.

Abstract: A function key assembly and a portable device having the same. The function key assembly is exposed to an outside of the portable device having a screen to allow a user to select various functions, includes a direction key unit provided in the portable device, and having a plurality of buttons to select or move a menu on the screen, a mode key unit movably provided around the direction key unit to allow the user to select a predetermined mode provided from the portable device according to a position motion thereof, and a circuit board provided inside the portable device to prevent the direction key unit and the mode key unit from being detached therefrom, and having switches to generate signals in response to an operation of the direction key unit and the mode key unit.

Abstract: An image photography apparatus enabling a user to capture an object by freely changing a position of the hand according to an angle shot while gripping the image photography apparatus. The image photography apparatus includes a main body and a rotation unit rotatably installed on the main body. The rotation unit includes a rotation part, a connection part rotatably connecting the rotation part to one side of the main body, and a grip band coupled to the rotation part.

Abstract: A digital device which can accommodate a large display yet still have a small overall size is provided. The digital device includes a first body with a lens and a display, and a second body with at least one operation button. The first and second body slide with respect to each other between a first position and a second position. The lens of the first body and the at least one operation button of the second body are exposed as the first body and the second body are slid into the first position.

Abstract: An image photographing apparatus includes a main body including a lens unit, and a recording medium driving unit to drive a recording medium that records an image photographed through the lens unit, a recording medium cover openably attached to the main body of the image photographing apparatus to insert or to remove the recording medium to or from the recording medium driving unit, a locking unit to lock or unlock the recording medium cover, and a manual opening unit detachably attached to the main body of the image photographing apparatus to expose and allow the locking unit to be manually operated to remove the recording medium in a “no power” situation.

Abstract: A hinge apparatus, which includes a first hinge part connected, in a rotatable manner, to a first electronic apparatus, a second hinge part having a second hinge axis connected in an inclined manner at a predetermined angle to a first hinge axis of the first hinge part, a wiring member for connecting the first and the second electronic apparatus by sequentially passing by the first and the second hinge axes in a manner of winding around the outer peripheral surfaces of each of the first and the second hinge axes. Accordingly, the hinge apparatus can connect a plurality of electronic apparatus so that those electronic apparatus are mutually rotatable in a plurality of rotational directions without implementing the complicated manufacturing process of forming through holes on each of the hinge axes, and inserting the wiring member into those through holes.

Abstract: An image photographing apparatus includes a deck assembly having a deck unit, a main board, and a first camera unit. A first exterior assembly has an opening corresponding to the deck unit, and is connected to one side of the deck assembly. A deck cover assembly is connected to the deck unit to open or close the opening of the first exterior assembly. A second exterior assembly is mounted with a second camera unit and a first display unit, and encompasses the other side of the deck assembly. A rear assembly is connected to the deck assembly to cover the rear side of the deck assembly. A front assembly covers the front side of the deck assembly. An upper assembly is connected to a second display unit and covers the upper portion of the deck assembly.

Abstract: An image photography apparatus enabling a user to capture an object by freely changing a position of the hand according to an angle shot while gripping the image photography apparatus. The image photography apparatus includes a main body and a rotation unit rotatably installed on the main body. The rotation unit includes a rotation part, a connection part rotatably connecting the rotation part to one side of the main body, and a grip band coupled to the rotation part.

Abstract: A portable electronic device is provided, including a first body, which has a display screen, a second body, which is slidably connected to the first body, and a door unit, which opens and closes a battery compartment disposed between the first and second bodies, in which the door unit is concealed and made externally visible according to the position of the second body relative to the first body, and in which the door unit can be opened and closed when it is externally visible.

Abstract: A function key assembly and a portable device having the same. The function key assembly is exposed to an outside of the portable device having a screen to allow a user to select various functions, includes a direction key unit provided in the portable device, and having a plurality of buttons to select or move a menu on the screen, a mode key unit movably provided around the direction key unit to allow the user to select a predetermined mode provided from the portable device according to a position motion thereof, and a circuit board provided inside the portable device to prevent the direction key unit and the mode key unit from being detached therefrom, and having switches to generate signals in response to an operation of the direction key unit and the mode key unit.

Abstract: A digital device which can accommodate a large display yet still have a small overall size is provided. The digital device includes a first body with a lens and a display, and a second body with at least one operation button. The first and second body slide with respect to each other between a first position and a second position. The lens of the first body and the at least one operation button of the second body are exposed as the first body and the second body are slid into the first position.

Abstract: A front frame of an image photographing apparatus integrally comprises a filter mounting piece with a threaded fastening part at its inner diameter, and an opening for exposing a remote control receiver. A circumferential surface of the filter mounting piece and a periphery of the opening are plated so that the number of parts required to manufacture the front frame can be reduced, which reduces manufacturing costs and allows the image photographing apparatus to be made smaller.

Abstract: A memory card slot door unit selectively opens and closes an entrance of a memory card slot used in a digital mobile apparatus. The memory card slot door unit includes a door for closing an entrance of a memory card slot. A plurality of hinges supporting a pivoting motion of the door against lateral walls of the memory card slot, so that the door selectively opens and closes the entrance of the memory card slot.

Abstract: Disclosed is a display for a portable electronic apparatus including a first and second casings enclosing an outer circumference of a display unit, at least one first hole penetrating the outer circumference of the first casing, at least one fastening projection protruding from an inner wall of the second casing, and having at least a fastening hole corresponding to the first hole, and at least one screw having a screw part which is screw-coupled with the fastening hole by penetrating the fist hole.

Abstract: Disclosed is a scroll key integrally formed with a function selecting switch that selects one of at least two functions. The scroll key comprises a circuit board having a circuit provided for a predetermined function, a vertical rotation switch mounted on the circuit board with a rotation axis thereof being substantially parallel with the circuit board, first and second tact switches mounted on the circuit board in alignment with the rotation axis of the vertical rotation switch, a rotation knob rotating between the vertical rotation switch and the first tact switch in substantially perpendicular relation to the circuit board to rotate the vertical rotation switch and press the first tact switch, and a button mounted on the circuit board to press the second tact switch. Accordingly, a small-sized scroll key can be implemented and assembling of the scroll key is improved.

Abstract: In a postal charge accounting system, a control unit is connected to a card read-write unit which accepts one or more so-called "smart cards". Postage meter use information is written into and read from one of these cards. The postage expanded by the card user is stored in the card memory and can be displayed or printed out as desired. The system is applicable to delivery services other than postal mail which involve a franking operation.