Abstract: A driving apparatus of a plasma display panel includes an energy recovery circuit. The energy recovery circuit recovers charging/discharging energies of a panel capacitor to a power source supplying unit using a transformer according to charging/discharging operations of the panel capacitor. It includes a first controlling switch, a second controlling switch, and a transformer. The second controlling switch is connected between the panel capacitor and the power source supplying unit and switched according to an external control signal to control the energy recovery from the panel capacitor to the power source supplying unit. The first controlling switch is connected between the panel capacitor and the power source supplying unit and switched according to an external control signal to control the energy recovered in the power source supplying unit to be supplied to the panel capacitor.

Abstract: A disk damper to reduce the vibration of a HSA (head stack assembly) by air flow caused by rotation of a disk, and a HDD (hard disk drive) having the same. The disk damper includes a front end positioned relatively far from the HSA and a rear end positioned relatively close to the HSA, and a first flow channel inducing the air flow caused by the rotation of the disk from the front end to the rear end through the inside of the disk damper.

Abstract: A suction nozzle of a vacuum cleaner includes jet units for jetting air into positions where air streams collide with each other as air is drawn into a suction port of the nozzle from both side portions thereof, so as to prevent substantially the collision of air streams.

Abstract: A pinch roller driving mechanism for a magnetic recording/reproducing apparatus, includes a main deck mounting a shaft of a capstan motor, a sub-deck that is loaded and unloaded with respect to the main deck, a pivot lever that is pivotably mounted to the main deck and supports a pinch roller that presses a magnetic tape into contact with the capstan shaft as the sub-deck is loaded, and an association unit that pivots the pivot lever so that the pinch roller contacts the shaft when the sub-deck is loaded, and returns the pivot lever to its initial position when the sub-deck is unloaded.

Abstract: A suction brush for a vacuum cleaner including a body, the bottom side of which is formed with a suction port; a cover for covering the top side of the body; and an air jetting path for absorbing ambient air from the bottom side of the body and jetting the air toward a surface to be cleaned, to space the bottom side from the surface to be cleaned.

Abstract: A method of preparing a toner is provided, including: polymerizing a toner composition including a chemically reformed or modified plant oil or a fatty acid, one or more polymerizable monomers, and a colorant with a free radical initiator; and separating and drying the polymerized toner. Also, provided are a toner prepared using the method, an image forming process using the toner, and an image forming apparatus employing the toner. According to the method, an environmentally friendly toner with superior durability and fixation properties is manufactured by using chemically reformed or modified plant oil or fatty acid. Also, regulating the size, the distribution and the configuration of toner particles are easy. In addition, the method does not involve the use or minimizes the use of a surfactant, thus decreasing the amounts of polluted water and waste water, which is very advantageous environmentally.

Abstract: A suction brush of a vacuum cleaner includes: a body configured to communicate with a dust collection device and including at least one suction port; a cover configured to cover a top of the body; and at least one rolling pin configured to be rotatably coupled at a bottom of the body.

Abstract: A method of preparing a toner, includes: preparing a core by mixing a polyester resin and a colorant with at least one material selected from the group consisting of a macromonomer having hydrophilic group, hydrophobic group, and at least one reactive functional group and a reactive emulsifying agent. A shell is formed on the core by polymerizing the exterior surface of the core with one or more polymerizable monomers and an initiator, wherein at least one material selected from the group consisting of the macromonomer and the reactive emulsifying agent participate in the polymerization reaction. Also, provided are a toner prepared using the method, an image forming method using the toner, and an image forming apparatus employing the toner.

Abstract: A liquid crystal display device comprising an LCD panel, a light guiding plate disposed in back of the LCD panel and a plurality of LEDs disposed on a plane in parallel with the LCD panel along a lateral side of the light guiding plate and arranged in two rows or more is provided. With this configuration, color mixing efficiency is enhanced while size of the display device is kept to a minimum.

Abstract: In an apparatus for driving a plasma display panel, first and second switches are coupled in series between a power source Vs and one terminal of a panel capacitor. Third and fourth switches are coupled in series between the one terminal of the panel capacitor and a power source ?Vs. A contact of the first and second switches is coupled to a ground terminal while the one terminal of the panel capacitor is substantially fixed to a voltage of ?Vs. A contact of the third and fourth switches is coupled to the ground terminal while the one terminal of the panel capacitor is substantially fixed to a voltage of Vs. Then, the withstand voltages of the first and second switches can be clamped to Vs while the voltage of ?Vs is applied to the one terminal of the panel capacitor. Likewise, the withstand voltages of the third and fourth switches can be clamped to Vs while the voltage of Vs is applied to the one terminal of the panel capacitor.

Abstract: A backlight unit and method of use are provided having a first light guide plate, a linear light source disposed along at least one side edge of the first light guide plate, a plurality of second light guide plates facing the first light guide plate, and a point light source disposed along at least one side edge of each second light guide plate. Accordingly, the present invention can provide a backlight unit using both a point light source and a linear light source at substantially the same time, and having superior color reproducibility and low power consumption.

Abstract: A method of preparing a toner is provided, including: preparing a colorant dispersion by mixing a reactive emulsifying agent and a colorant; preparing a toner composition by mixing a macromonomer having hydrophilic group, hydrophobic group and at least one reactive functional group, at least one polymerizable monomer, a multifunctional polyester, and the colorant dispersion; emulsion polymerizing the toner composition in a medium; and separating and drying the polymerized toner. A toner is prepared using the method, an image forming method using the toner and an image forming apparatus employing the toner are also provided. According to the method, the size, distribution and configuration of toner particles are easily controlled. In addition, the method minimizes a cleaning process, thereby decreasing the amounts of polluted water and waste water, which is very advantageous environmentally.

Abstract: A liquid crystal display and control method thereof, having a liquid crystal display panel, a light emitting diode device which is disposed on the rear of the liquid crystal display panel and which is divided into a plurality of partitioned areas that are capable of being driven independently, a light guide part disposed for each of the partitioned areas, an image calculating part for dividing the liquid crystal display panel into a plurality of regions and calculating the brightness of each region by using image data, and an inverter and an inverter controller to provide differentiated power to the partitioned areas based on the calculated brightness.

Abstract: The present invention relates to an LCD and a method for improving display thereof where a plurality of LED devices are mounted on a rear of LCD panel, and a partition which allows the plurality of the LED devices to be disposed in a plurality of partitioned areas is provided. The thickness of the partition narrows toward the LCD panel. A power supplier supplies power to the plurality of LED devices, and a controller controls the power supplier to supply the power to the LED device in each divided area sequentially and repeatedly. An LCD with improved contrast ratio while LED devices are separately driven in a plurality of partitioned areas is achieved.

Abstract: A method of preparing a toner, includes: preparing a colorant dispersion by mixing a reactive emulsifying agent and a colorant; preparing a toner composition by mixing a macromonomer having a hydrophilic group, a hydrophobic group and at least one reactive functional group, at least one polymerizable monomer, and the colorant dispersion; emulsion polymerizing the toner composition in a medium; and separating and drying the polymerized toner. A toner prepared using the method, an image forming method using the toner, and an image forming apparatus using the toner are also provided. According to the method, the size, distribution and configuration of toner particles are easily controlled. In addition, the method minimizes a cleaning process, thereby decreasing the amounts of polluted water and waste water, which is very advantageous environmentally.

Abstract: Disclosed is a PDP driving circuit and a driving method thereof. A first switch is coupled between a Y electrode of a panel capacitor and a positive polarity terminal of a voltage source supplying a voltage Vs/2, a second switch is coupled between the positive polarity terminal of the voltage source and ground, a third switch is coupled between the Y electrode and a negative polarity of the voltage source, and a fourth switch is coupled between the negative polarity of the voltage source and ground. The voltage ?Vs/2 is applied to an X electrode of the panel capacitor while the voltage Vs/2 is applied to the Y electrode thereof, and the voltage Vs/2 is applied to the X electrode while the voltage ?Vs/2 is applied to the Y electrode.

Abstract: A method of preparing a toner includes: preparing a toner composition including a macromonomer having a hydrophilic group, a hydrophobic group and at least one reactive functional group, at least one polymerizable monomer, and a colorant; emulsion-polymerizing the toner composition in a medium; and separating and drying the polymerized toner. A toner is prepared using the method. An image forming method using the toner, and an image forming apparatus using the toner are also provided. According to the method, the size, distribution and configuration of toner particles are easily controlled. In addition, the method does not involve the use of or minimizes the use of a surfactant, and decreases polluted water and waste water, which is very advantageous environmentally.

Abstract: In an address driving circuit including a power recovery circuit, an energy charged in an external capacitor is established to be greater than an energy discharged from the external capacitor. As a result, a voltage of the external capacitor is increased to an address voltage to automatically stop a power recovery operation in the case of displaying a full white pattern. Further, to perform the power recovery operation in the cases of the dot on/off pattern and the line on/off pattern, the voltage of the external capacitor reaches an equilibrium state between the half the address voltage and the address voltage.

Abstract: An OCB (Optically Compensated Bend) liquid crystal display in which impulse driving is performed such that an impulse data voltage is applied between normal data voltages used for displaying an image. The impulse data voltage is divided into a first impulse data voltage and a second impulse data voltage having a voltage value that will not break a bent alignment of the OCB liquid crystals. Referring to the application of the first impulse data voltage between the normal data voltages as first impulse driving and the application of the second impulse data voltage between the normal data voltages as second impulse driving, the second impulse driving is performed at every two or more of the first impulse drivings, so as to not break the bent alignment of the liquid crystals and to thereby improve luminance of the LCD.

Abstract: An apparatus for driving a plasma display panel includes a first driver and a second driver and a first power supplier and a second power supplier for generating sustain discharge pulses having no negative (?) level. The first driver includes a first capacitor charged to a first voltage and is coupled to a power source for supplying a voltage Vs and a ground voltage. The first driver, coupled to one terminal of a panel capacitor, operates to alternately apply double the voltage Vs formed by the power source and the first capacitor and the ground voltage to the one terminal of the panel capacitor. The second power supplier, coupled to the power source and the ground voltage, includes a second capacitor charged to Vs. The second driver coupled to the other terminal of the panel capacitor operates to alternately apply double the voltage Vs formed by the power source and the second capacitor and the ground voltage to the other terminal of the panel capacitor.