Abstract: A mobile communication device is provided. The mobile communication device includes a terminal body, and a speaker module located in the terminal body. The speaker module includes an enclosure located in the terminal body, the enclosure defining a chamber therein, and a speaker having a front surface and a rear surface, the speaker being located in the enclosure such that the front surface of the speaker is exposed from the enclosure and the rear surface thereof is positioned within the chamber, to allow a sound generated from the rear surface to resonate within the chamber. A mutual interference between the sound generated from the front side of the sound emission part and the sound emitted from the rear side thereof can be reduced to thereby improve the performance of the middle and low sound.

Abstract: Provided is a method for fabricating a semiconductor device having reduced contact resistance. In the method, gate patterns defining a narrow opening and a wide opening are formed having an upper portion of a predetermined region of a semiconductor substrate. After gate spacers are formed on sidewalls of the gate patterns, an ion implantation process that uses the gate patterns and the gate spacers as an ion mask is performed to form a plug doped region in a portion of the semiconductor substrate that is located below the wide opening. At this point, the gate spacers are formed to expose a portion of a bottom surface of the wide opening and to fill a lower portion of the narrow opening.

Abstract: A hermetic compressor comprising a discharge valve, and a stopper for restricting an opening degree of the discharge valve. The discharge valve includes a body portion configured to cover a discharge port formed at a valve plate, and a first protrusion extending from the body portion. The stopper includes an inclined portion for supporting the body portion, and a second protrusion extending a support portion thereof. In this case, a distance between the first and second protrusions is shorter than a distance between the inclined portion and body portion. With such first and second protrusions, an opening operation of the discharge valve is gradually achieved.

Abstract: Disclosed is a bracket for fixing a compressor capable of reducing vibration generated due to resonance occurring when a specific frequency generated from the compressor matches with a natural frequency of the bracket for fixing the compressor. The bracket for fixing the compressor includes a body section extending in one direction and a folding section coupled so as to change the natural frequency of the bracket. The bracket for fixing the compressor includes a body section extending in one direction and a weight coupled to the body section so as to reduce displacement when the bracket is vibrated.

Abstract: A display apparatus having a displaying part, includes a video processing part to process an input video signal into a format which can be displayed on the displaying part, and a controlling part to determine whether a video image displayed on the displaying part is a still image, and if it is determined that the video image is the still image, to control the video processing part to display the video image according to the input video signal and a predetermined after-image prevention image alternately on the displaying part. Thus, the present general inventive concept provides a display apparatus which is capable of removing an after-image effect occurring in a display panel effectively, and a control method thereof.

Abstract: A method of preventing image burn-in of a display apparatus to display an image includes detecting pixel data of a pixel of the image, calculating OSD data corresponding to the detected pixel data, generating the calculated OSD data, and merging the OSD data to the pixel data and displaying the merged OSD data in the pixel for a predetermined refresh period of time.

Abstract: Disclosed herein are a suction muffler for compressors, a compressor with the suction muffler, and an apparatus having a refrigerant circulation circuit including the compressor. The present invention allows an amount of a refrigerant sucked into a compression chamber to be maximized, and allows suction noise generated during a suction stroke to be minimized. The suction muffler includes a refrigerant channel, and an outer casing. The refrigerant channel communicates at an inlet thereof with a suction pipe which guides a refrigerant to a compressor, and controllably communicates at an outlet thereof with a compression chamber in which the refrigerant is compressed. The outer casing has a structure to convert a flowing motion of the refrigerant into a spiral flowing motion while the refrigerant flows from the suction pipe to the inlet. At least one resonance chamber is formed around an outlet of the refrigerant channel.

Abstract: A display apparatus having a lock function for an external input and a method of implementing the lock operation to prevent teenagers from viewing inappropriate videos by setting the lock operation when changing an input signal. The method of implementing the lock operation for the external input includes receiving and storing a password as a first password used for setting the lock operation to be performed when changing the input signal, requesting that a password be input as a second password whenever a change of the input signal is required, to determine whether the input second password and the stored first password are the same, and changing the input signal if the input second password and the stored first password are the same, to display an image corresponding to the changed input signal.

Abstract: Disclosed herein are a suction muffler for compressors, a compressor with the suction muffler, and an apparatus having a refrigerant circulation circuit including the compressor. The present invention allows an amount of a refrigerant sucked into a compression chamber to be maximized, and allows suction noise generated during a suction stroke to be minimized. The suction muffler includes a refrigerant channel, and an outer casing. The refrigerant channel communicates at an inlet thereof with a suction pipe which guides a refrigerant to a compressor, and controllably communicates at an outlet thereof with a compression chamber in which the refrigerant is compressed. The outer casing has a structure to convert a flowing motion of the refrigerant into a spiral flowing motion while the refrigerant flows from the suction pipe to the inlet. At least one resonance chamber is formed around an outlet of the refrigerant channel.

Abstract: A valve for a hermetic compressor has a valve plate disposed between a cylinder block and a cylinder head. The cylinder block has a cylinder, and the cylinder head has a refrigerant suction chamber and a refrigerant discharge chamber, which are partitioned from one another by a partition. The cylinder head further has at least first, second and third plates of different thicknesses, a refrigerant suction passage for interconnecting the refrigerant suction chamber and the cylinder; and a refrigerant discharge passage for interconnecting the refrigerant discharge chamber and the cylinder. A suction valve opens and closes the refrigerant suction passage while being moved by pressure in the cylinder; and a discharge valve opens and closes the refrigerant discharge valve while being moved by the pressure in the cylinder.

Abstract: An apparatus for compressing fluid comprises a cylinder bore longitudinally penetrating a cylinder block a suction port penetrating to the cylinder bore, and a pair of slot-shaped fluid discharge having one opening at an end portion of the cylinder bore; a piston; a discharge valve assembly movably disposed at the cylinder bore to selectively open and close the fluid discharge ports of the cylinder block, the discharge valve assembly including a valve piston having a flange for limiting movement of the discharge valve assembly; a cylinder head defining a discharge chamber communicating with the fluid discharge ports, the cylinder head having a fluid discharge passage from the discharge chamber. The fluid suction port is selectively opened by the piston reciprocally moving in the cylinder bore to draw in fluid, which is discharged through the fluid discharge ports opened by the movement of the valve piston as the pressure of the fluid in the cylinder bore increases beyond a predetermined threshold.

Abstract: A cylinder assembly for a hermetic compressor includes a cylinder block having a cylinder in which a piston reciprocates; a cylinder head connected to a cylinder block to seal the cylinder, the head having an inlet hole and being divided by a partition into a first and a second discharge chamber that serve as an outlet path. A valve assembly formed between the cylinder block and the cylinder head, which controls refrigerant outlet and inlet to and from the cylinder according to different refrigerant pressures inside and outside the cylinder. When a sound wave (that is created as the suction valve or the discharge valve hits the valve plate) escapes to a discharge valve through a first and second discharge chambers, sound transmission loss occurs due to boundary interference and as a result, the sound wave is reduced. By this method, noise can be reduced in operating the compressor.

Abstract: A discharge valve of a hermetic compressor includes a valve plate disposed on a cylinder head that draws in and discharges refrigerant according to reciprocal movement of a piston, and the discharge valve having a discharge hole formed therein through which refrigerant is discharged, a disc valve disposed adjacent the discharge hole of the valve plate, the disc valve being raised or lowered by the reciprocal movement of the piston and disc valve weight, and a stopper disposed above the disc valve, for guiding the raising and lowering of the disc valve and also for limiting the height to which the disc valve may be raised. The compressor is not subject to overload or over pressurization that may otherwise result from an elastic closing force operating in the valve, and as a result, compression efficiency is increased, while noise is decreased.

Abstract: A fluid compressing apparatus including a cylinder block having a cylinder bore with a diameter penetrating through the cylinder block in a lengthwise direction, a discharge chamber having a diameter larger than the diameter of the cylinder bore, and at least one fluid suction port penetrating into the cylinder block including an interconnected space comprising a fluid discharge port. A piston serves to open and close the suction port while linearly reciprocating within the cylinder bore eliminating need for a separate suction valve assembly. A valve plate separates from and opens the discharge port as a result of the high pressure of the fluid in the cylinder bore, thus compressing the fluid until completely discharged; such that the clearance volume in the cylinder bore is minimized improving compression efficiency.

Abstract: A valve for a hermetic compressor has a valve plate disposed between a cylinder block and a cylinder head. The cylinder block has a cylinder, and the cylinder head has a refrigerant suction chamber and a refrigerant discharge chamber, which are partitioned from one another by a partition. The cylinder head further has at least first, second and third plates of different thicknesses, a refrigerant suction passage for interconnecting the refrigerant suction chamber and the cylinder; and a refrigerant discharge passage for interconnecting the refrigerant discharge chamber and the cylinder. A suction valve opens and closes the refrigerant suction passage while being moved by pressure in the cylinder; and a discharge valve opens and closes the refrigerant discharge valve while being moved by the pressure in the cylinder.

Abstract: A fluid compressing apparatus for drawing, compressing and discharging a fluid including a cylinder block having a cylinder bore of a predetermined diameter penetrating through the cylinder block in a lengthwise direction, a discharge chamber having a diameter larger than the diameter of the cylinder bore, and at least one fluid suction port penetrating into the cylinder block in a substantially perpendicular direction with respect to the lengthwise direction of the cylinder bore, the cylinder block using a certain space thereof that is interconnected with the discharge chamber of the cylinder bore as a fluid discharge port; a piston movably disposed in the cylinder bore of the cylinder block to be linearly reciprocated; a discharge valve assembly having a valve plate disposed to be resiliently biased from the discharge chamber toward the fluid discharge port so as to selectively open or close the fluid discharge port of the cylinder block; and a cylinder head disposed at an end of the discharge chamber of th

Abstract: An apparatus for compressing fluid comprises: a cylinder block including a cylinder bore with a predetermined diameter penetrating the cylinder block in a lengthwise direction, at least one fluid suction port penetrating in a direction intersecting with the cylinder bore, and at least a pair of fluid discharge ports preferably of a slot shape and having one opening formed at both end portions of the cylinder bore; a piston for reciprocally moving within the cylinder bore; a discharge valve assembly movably disposed at the cylinder bore in order to selectively open and close the fluid discharge ports of the cylinder block, the discharge valve assembly including a valve piston having a flange for limiting movement of the discharge valve assembly; and a cylinder head for forming a discharge chamber communicating with the fluid discharge ports by a connection to the cylinder block, and the cylinder head having a fluid discharge passage of the discharge chamber.

Abstract: A discharge valve of a hermetic compressor includes a valve plate disposed on a cylinder head that sucks and discharges refrigerant according to reciprocal movement of a piston, and the discharge valve having a discharge hole formed therein through which refrigerant is discharged, a disc valve disposed adjacent the discharge hole of the valve plate, the disc valve being raised or lowered by the reciprocal movement of the piston, and a stopper disposed above the disc valve, for guiding the raising and lowering of the disc valve and also for limiting the height to which the disc valve may be raised. The compressor is not subject to overload or over pressurization that may otherwise result from the elastic force of the valve, and as a result, compression efficiency is increased, while noise is decreased.

Abstract: A compressor is capable of reducing vibration and noise produced during a discharge of compressed refrigerant through a discharge line tube. The discharge line tube of the compressor has a bent portion to reduce vibration and noise when the compressed refrigerant is discharged into a discharge pipe. The compressor includes an elastic member having hooks formed on both ends thereof, for generating a predetermined tension while being supported on the bent portion of the discharge line tube on two locations. Since vibration and noise can be reduced significantly, appliances that require the compressor as an essential element can provide optimum environment to users.

Abstract: A compressor is capable of reducing vibration and noise produced during a discharge of compressed refrigerant through a discharge line tube. The discharge line tube of the compressor has a bent portion to reduce vibration and noise when the compressed refrigerant is discharged into a discharge pipe. The compressor includes an elastic member having hooks formed on both ends thereof, for generating a predetermined tension while being supported on the bent portion of the discharge line tube on two locations. Since vibration and noise can be reduced significantly, appliances that require the compressor as an essential element can provide optimum environment to users.