Abstract: A display device includes a display panel to display an image; and a sound generator disposed on a surface of the display panel to vibrate the display panel, wherein distances between each of a plurality of side surfaces of the sound generator and each of a plurality of side surfaces of the display panel respectively corresponding to the each of the plurality of side surfaces of the sound generator are substantially equal.

Abstract: A method of operating an ESS with optimal efficiency includes: collecting charge/discharge efficiency data of a PCS; collecting charge/discharge efficiency data of a battery depending on current state of charge of the battery; creating charge/discharge efficiency data of a unit BESS including the PCS and the battery by using the collected data; determining optimal charge/discharge levels of at least two unit-BESSs included in the ESS by using charge/discharge efficiency data of the at least two unit-BESSs to satisfy commanded input/output power values of the whole ESS at a current point of time; and charging or discharging the at least two unit-BESSs depending on the determined optimal charge/discharge power values.

Abstract: An ESS charging and discharging operation method may include the steps of: checking whether SOC of the ESS is within an operable range, and performing an SOC management operation if the SOC of the ESS is not within the operable range; performing, if the SOC of the ESS is within the operable range, a catenary wire voltage control operation based on range of catenary wire voltage and range of variation rate of the catenary wire voltage; performing the SOC management operation after the ESS is charged or discharged depending on the catenary wire voltage control operation over unit time, if output current of the ESS does not exceed current reference value; and stopping the catenary wire voltage control operation and switching the operation to a standby state.

Abstract: A display device includes a display panel to display an image; and a sound generator disposed on a surface of the display panel to vibrate the display panel, wherein distances between each of a plurality of side surfaces of the sound generator and each of a plurality of side surfaces of the display panel respectively corresponding to the each of the plurality of side surfaces of the sound generator are substantially equal.

Abstract: A method for estimating lifespan of a battery in accordance with the present invention, comprising steps of: fully discharging the battery; partially charging the fully discharged battery under a predetermined charging condition; acquiring pieces of voltage information at multiple specific points of measurement time while partially charging the battery; and calculating remaining capacity of the battery by using the acquired pieces of voltage information.

Abstract: Provided is a battery lifetime estimating method including steps of: fully charging a battery according to a predetermined charging condition; partially discharging the fully charged battery according to a predetermined discharging condition; acquiring voltage information at a plurality of predetermined measurement time points while performing the partially discharging; and estimating a remaining capacity of the battery by using the acquired voltage information. Herein, the step of estimating the remaining capacity of the battery includes steps of: calculating the capacity of the battery in one cycle of fully charging/discharging in which the measurement is performed from the measured voltage drop amounts; and estimating the remaining lifetime of the battery by applying a statistical technique to the capacity of the battery calculated with respect to a plurality of cycles of fully charging/discharging.

Abstract: An ESS charging and discharging operation method may include the steps of: checking whether SOC of the ESS is within an operable range, and performing an SOC management operation if the SOC of the ESS is not within the operable range; performing, if the SOC of the ESS is within the operable range, a catenary wire voltage control operation based on range of catenary wire voltage and range of variation rate of the catenary wire voltage; performing the SOC management operation after the ESS is charged or discharged depending on the catenary wire voltage control operation over unit time, if output current of the ESS does not exceed current reference value; and stopping the catenary wire voltage control operation and switching the operation to a standby state.

Abstract: A method of operating an ESS with optical efficiency in accordance with the present invention, comprising steps of: collecting charge/discharge efficiency data of a PCS; collecting charge/discharge efficiency data of a battery depending on current state of charge of the battery; creating charge/discharge efficiency data of a unit BESS including the PCS and the battery by using the collected data; determining optimal charge/discharge levels of at least two unit-BESSs included in the ESS by using charge/discharge efficiency data of the at least two unit-BESSs to satisfy commanded input/output power values of the whole ESS at a current point of time; and charging or discharging the at least two unit-BESSs depending on the determined optimal charge/discharge power values.

Abstract: A method for estimating lifespan of a battery in accordance with the present invention, comprising steps of: fully discharging the battery; partially charging the fully discharged battery under a predetermined charging condition; acquiring pieces of voltage information at multiple specific points of measurement time while partially charging the battery; and calculating remaining capacity of the battery by using the acquired pieces of voltage information.

Abstract: Provided is a battery lifetime estimating method including steps of: fully charging a battery according to a predetermined charging condition; partially discharging the fully charged battery according to a predetermined discharging condition; acquiring voltage information at a plurality of predetermined measurement time points while performing the partially discharging; and estimating a remaining capacity of the battery by using the acquired voltage information. Herein, the step of estimating the remaining capacity of the battery includes steps of: calculating the capacity of the battery in one cycle of fully charging/discharging in which the measurement is performed from the measured voltage drop amounts; and estimating the remaining lifetime of the battery by applying a statistical technique to the capacity of the battery calculated with respect to a plurality of cycles of fully charging/discharging.

Abstract: The present invention relates to a signal detection system of a touch screen, and more particularly to a signal detection system of a large-sized mutual capacitive multi touch screen that is capable of effectively reducing RC time delay, signal distortion, an effect of noise, parasitic resistance, and parasitic capacitance.

Abstract: The present invention relates to a signal detection system of a touch screen, and more particularly to a signal detection system of a large-sized mutual capacitive multi touch screen that is capable of effectively reducing RC time delay, signal distortion, an effect of noise, parasitic resistance, and parasitic capacitance.

Abstract: A terminal and method for increasing security of location information, including: a modem including a GPS engine to process signals and control a GPS module, to perform voice and data communication; a software block connected to the modem and to application program(s) to provide a location information service, the software block to transmit a GPS signal and information to the modem and the application program; and a location information control module to detect a location information transmission request, or a GPS module activation instruction, to the modem or the software block, and to determine whether the location information transmission request, and the GPS module activation instruction, are authorized or unauthorized operations, and to allow or interrupt a fulfillment of the location information transmission request or the GPS module activation instruction according to the determination result. Accordingly, unauthorized transmission of location information may be decreased, thereby increasing security.