Abstract: In an embodiment a headrest position adjustment apparatus includes a fixing frame having a guide plate including a first slide hole at an upper end portion and a second slide hole at a lower end portion, wherein a rear surface portion of the fixing frame is configured to be mounted to a high-back board, a first motor mounted on the fixing frame, wherein the first motor is configured to move a headrest, a fixing guide mounted on the fixing frame, wherein the fixing guide has a pair of first guide pipes facing forward, a first slide including upper guide holes arranged on an upper position on opposite sides of the first slider and lower guide holes arranged on a lower position of the opposite sides of the first slider and into which the first guide pipes are inserted, and a second slider mounted on the headrest.

Abstract: In an embodiment a headrest position adjustment system includes a housing mounted on a front surface portion of a high-back board, a headrest mounted on the housing, the headrest being capable of moving forward and backward, a fixing frame comprising slide holes in opposite side portions of the fixing frame, the fixing frame being mounted inside the housing, a first motor mounted on the fixing frame, the first motor having a first lead screw facing forward as an output shaft, and a side bracket disposed on each of the opposite side portions of the fixing frame and connected to the headrest, the side bracket being fastened to a slide hole such that the side bracket is capable of being moved forward and backward.

Abstract: An automatically operatable electric wing-out headrest includes a motor having a lead screw configured to adjust forward-and-rearward rotation of wing-out pads respectively mounted on the opposite sides of a headrest body, a first slider coupled to the lead screw so as to be movable upwards and downwards, a second slider configured to contact the first slider so as to be movable forwards and rearwards, and a wing-out link connected to the second slider to rotate a wing-out frame.

Abstract: An electric headrest sliding device includes a slider configured to be movable upwards and downwards by driving of a motor, a front frame of a headrest, and a rotation link configured to connect the slider to the front frame, wherein the rotation link is rotated forwards or rearwards to push or pull the front frame during upward-and-downward movement of the slider, thereby accurately adjusting the front and rear positions of the headrest.

Abstract: An automatically operatable electric wing-out headrest includes a motor having a lead screw configured to adjust forward-and-rearward rotation of wing-out pads respectively mounted on the opposite sides of a headrest body, a first slider coupled to the lead screw so as to be movable upwards and downwards, a second slider configured to contact the first slider so as to be movable forwards and rearwards, and a wing-out link connected to the second slider to rotate a wing-out frame.

Abstract: A wing-out headrest for a vehicle is disclosed. The headrest for a vehicle includes: a main frame mounted on a stay; a first frame assembly mounted on the main frame to reciprocate in a back and forth direction of the vehicle; a second frame assembly mounted on the main frame to reciprocate in a back and forth direction of the vehicle; and a wing-out frame mounted on the second frame assembly, and including a center frame and a pair of first and second lateral frames rotatably mounted on respective sides of the center frame, wherein the second frame assembly and the wing-out frame may move back and forth as the first frame assembly moves, and the one pair of lateral frames of the wing-out frame may be rotated as the second frame assembly moves.

Abstract: An electric headrest sliding device includes a slider configured to be movable upwards and downwards by driving of a motor, a front frame of a headrest, and a rotation link configured to connect the slider to the front frame, wherein the rotation link is rotated forwards or rearwards to push or pull the front frame during upward-and-downward movement of the slider, thereby accurately adjusting the front and rear positions of the headrest.

Abstract: An automatically operatable electric wing-out headrest includes a motor having a lead screw configured to adjust forward-and-rearward rotation of wing-out pads respectively mounted on the opposite sides of a headrest body, a first slider coupled to the lead screw so as to be movable upwards and downwards, a second slider configured to contact the first slider so as to be movable forwards and rearwards, and a wing-out link connected to the second slider to rotate a wing-out frame.

Abstract: A wing-out headrest for a vehicle is disclosed. The headrest for a vehicle includes: a main frame mounted on a stay; a first frame assembly mounted on the main frame to reciprocate in a back and forth direction of the vehicle; a second frame assembly mounted on the main frame to reciprocate in a back and forth direction of the vehicle; and a wing-out frame mounted on the second frame assembly, and including a center frame and a pair of first and second lateral frames rotatably mounted on respective sides of the center frame, wherein the second frame assembly and the wing-out frame may move back and forth as the first frame assembly moves, and the one pair of lateral frames of the wing-out frame may be rotated as the second frame assembly moves.

Abstract: A forward tilting mechanism of a headrest for a vehicle and a headrest including the same are configured so that the headrest can be tilted forward in a simplified operating method. A forward tilting mechanism of a headrest includes: a fixing bracket mounted on a stay; a main body rotatably coupled to the fixing bracket; a driving part mounted on the fixing bracket between the fixing bracket and the main body; and a slider disposed between the driving part and the main body, and configured to be movable by operation of the driving part and configured to provide a moving force to the main body such that the main body is rotatable by the movement of the slider.

Abstract: This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for an organic electroluminescent device has high thermal stability, high triplet energy and high hole transport capability, and the organic electroluminescent device including the same is improved in thermal stability and light emission efficiency. When this compound is used as a hole transport layer material, a triplet exciton of a phosphorescent light emitting material is confined, thus improving efficiency of the organic electroluminescent device.

Abstract: The present invention relates to a method for preparing a tris(trialkylsilyl)phosphine in high yield and high purity with safety and no risk of fire or explosion.

Abstract: This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for an organic electroluminescent device including the same is improved in thermal stability and light emission efficiency. When this compound is used as a hole transport layer material, a triplet energy of a phosphorescent light emitting material is increased, thus improving the efficiency of the organic electroluminescent device.

Abstract: The present invention relates to a method for preparing a tris(trialkylsilyl)phosphine in high yield and high purity with safety and no risk of fire or explosion.

Abstract: This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for an organic electroluminescent device has high thermal stability, high triplet energy and high hole transport capability, and the organic electroluminescent device including the same is improved in thermal stability and light emission efficiency. When this compound is used as a hole transport layer material, a triplet exciton of a phosphorescent light emitting material is confined, thus improving efficiency of the organic electroluminescent device.

Abstract: This invention relates to a compound for an organic electroluminescent device represented by Chemical Formula 1 below and to an organic electroluminescent device including the same. According to the present invention, the organic electroluminescent device including the compound may have improved thermal stability and light emission efficiency. When the compound is used as a hole transport layer material, a triplet energy of a phosphorescent light emitting material increase, thus improving efficiency of the organic electroluminescent device.

Abstract: The present invention relates to a method for preparing polyarylene sulfide with a reduced free iodine content. More specifically, the method for preparing polyarylene sulfide includes: (a) polymerizing reactants including a diiodo aromatic compound and a sulfur compound to form a polyarylene sulfide; and (b) maintaining the polyarylene sulfide product at 100 to 260° C. for heat-setting. The preparation method of the present invention effectively reduces the free iodine content of the polyarylene sulfide to prevent potential corrosion of facilities for the subsequent process and improves the properties of the polyarylene sulfide product such as thermal stability, so the method can be usefully applied to industrial fields in regard to the preparation of polyarylene sulfide.

Abstract: The present invention relates to a method for preparing polyarylene sulfide with a reduced free iodine content. More specifically, the method for preparing polyarylene sulfide includes: (a) polymerizing reactants including a diiodo aromatic compound and a sulfur compound to form a polyarylene sulfide; and (b) maintaining the polyarylene sulfide product at 100 to 260° C. for heat-setting. The preparation method of the present invention effectively reduces the free iodine content of the polyarylene sulfide to prevent potential corrosion of facilities for the subsequent process and improves the properties of the polyarylene sulfide product such as thermal stability, so the method can be usefully applied to industrial fields in regard to the preparation of polyarylene sulfide.

Abstract: This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for an organic electroluminescent device including the same is improved in thermal stability and light emission efficiency. When this compound is used as a hole transport layer material, a triplet energy of a phosphorescent light emitting material is increased, thus improving the efficiency of the organic electroluminescent device.

Abstract: The present invention relates to a polyarylene sulfide that is prepared from a composition including 100 parts by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur, and has a melting temperature (Tm) of 255 to 285° C., and luminosity of 40 or higher as defined by the CIE Lab color model, and a process of preparing the same. The PAS resin is prepared from a composition including a sulfur-containing polymerization terminator and thus has excellent thermal properties and luminosity.