Abstract: A battery includes an electrode assembly including a first electrode, a second electrode and a separator between the first electrode and the second electrode, the first electrode, the second electrode and the separator being wound around a winding axis to define a core and an outer peripheral surface. The first electrode and the second electrode include a first uncoated region and a second uncoated region along a winding direction, respectively, and an active material layer coating is absent in the first uncoated region and the second uncoated region. The battery further includes a housing receiving the electrode assembly through an opening formed at a bottom, a first current collector coupled to the first uncoated region and disposed within the housing, a cap covering the opening, a spacer interposed between the cap and the electrode assembly to fix the electrode assembly and seal the housing, and a terminal electrically connected to the second uncoated region.

Abstract: Disclosed is an electrode assembly, a battery, and a battery pack and a vehicle including the same. In the electrode assembly, a first electrode, a second electrode, and a separator interposed therebetween are wound based on a winding axis to define a core and an outer circumference. The first electrode includes a first active material portion coated with an active material layer and a first uncoated portion not coated with an active material layer along a winding direction. At least a part of the first uncoated portion is defined as an electrode tab by itself. The first uncoated portion includes a first portion adjacent to the core of the electrode assembly, a second portion adjacent to the outer circumference of the electrode assembly, and a third portion interposed between the first portion and the second portion. The first portion or the second portion has a smaller height than the third portion in the winding axis direction.

Abstract: Provided are an electrode assembly, a battery, and a battery pack and vehicle including the same. An electrode assembly, in which a first electrode, a second electrode, and a separator interposed therebetween are wound about an axis to define a core and an outer circumferential surface. At least one of the first electrode and the second electrode includes, at a long side end portion, an uncoated portion exposed beyond the separator in a direction of the axis. At least a part of the uncoated portion is bent in a radial direction of the electrode assembly to define a bent surface region having overlapping layers of the uncoated portion. The bent surface region includes a welding target region having a number of the overlapping layers of the uncoated portion, and the welding target region extends along a radial direction of the electrode assembly.

Abstract: A battery includes an electrode assembly including a first uncoated region and a second uncoated region; a battery housing accommodating the electrode assembly and electrically connected to the second uncoated region; a cap to cover an open portion on bottom of the battery housing; a first electrode terminal passing through a partially closed portion of the battery housing and being electrically isolated from the battery housing; and a first current collector coupled to the first uncoated region and connected to the first electrode terminal.

Abstract: A battery includes an electrode assembly including a first electrode, a second electrode and a separator between the first electrode and the second electrode wound around a winding axis to define a core and an outer circumferential surface, the first electrode including a first uncoated region in which an active material layer is not coated along a winding direction; a housing accommodating the electrode assembly through an open portion at a lower end thereof; a first current collector coupled to the first uncoated region and disposed in the housing; a cap to cover the open portion; and a spacer between the first current collector and the cap and having a height corresponding to a distance between the first current collector and the cap.

Abstract: A DC-DC converter includes a plurality of converters and a discharging circuit. The converters convert an input power voltage from an input terminal to a plurality of output power voltages for output to a plurality of output terminals. The discharging circuit is between the input terminal and the converters and discharges of voltages of the output terminals based on a discharging control signal.

Abstract: A display device may include a frequency detector, a control part, and a display panel. The frequency detector may receive an alternating current and may detect (and/or calculate) an alternating-current frequency associated with the alternating current. The control part may be electrically connected to the frequency detector and may generate a control signal using the alternating-current frequency. The display panel may be electrically connected to the control part and may display an image using the control signal.

Abstract: A display device may include a frequency detector, a control part, and a display panel. The frequency detector may receive an alternating current and may detect (and/or calculate) an alternating-current frequency associated with the alternating current. The control part may be electrically connected to the frequency detector and may generate a control signal using the alternating-current frequency. The display panel may be electrically connected to the control part and may display an image using the control signal.

Abstract: Provided is a display device, including: a display unit including a plurality of pixels that emit light according to a plurality of data signals supplied through a plurality of data lines; a power voltage supplier configured to supply a power voltage to the plurality of pixels; a current detector configured to detect a total current flowing in the plurality of pixels; and a controller configured to receive image information of one frame unit and generate a reference voltage signal corresponding to the image information of one frame unit. The current detector compares the total current and the reference voltage signal and controls driving of the power voltage supplier according to the comparison.

Abstract: An organic light emitting display device includes a display unit including pixels coupled to scan lines and data lines, first and second power lines coupled to the pixels, a DC-DC converter configured to output first and second power sources to the pixels via the first and second power lines, respectively, and a short-circuit-sensing circuit configured to detect whether a short-circuit between the first and second power lines occurs, and configured to control an operation of the DC-DC converter when the short-circuit is detected, wherein voltage levels of the first and second power sources are configured to be changed in a frame period, the frame period including a reverse voltage application period in which the voltage level of the second power source is higher than that of the first power source.

Abstract: A DC-DC converter includes a plurality of converters and a discharging circuit. The converters convert an input power voltage from an input terminal to a plurality of output power voltages for output to a plurality of output terminals. The discharging circuit is between the input terminal and the converters and discharges of voltages of the output terminals based on a discharging control signal.

Abstract: Disclosed are an apparatus and a method for generating a constant current pulse wave, a medical operation method using the same, and a light generating apparatus. The apparatus for generating a constant current pulse wave comprises: a charge unit receiving a current and charging electric charges; a converter unit applying a constant voltage to a flash lamp during a first reference time and applying a constant current to the flash lamp during a second reference time by using the electric charges charged in the charge unit; and a controller operating in a constant voltage control mode to transmit a constant voltage control signal for controlling the converter unit to output the constant voltage, to the converter unit during the first reference time and operating in a constant current control mode to transmit a constant current control signal for controlling the converter unit to output the constant current, to the converter unit during the second reference time.

Abstract: A display device having a particular power controller circuit is disclosed. In one aspect, the display includes a plurality of pixels, and a power controller for supplying a first power source voltage and a second power source voltage for providing a driving current of the plurality of pixels wherein the power controller connects at least one of a first high level voltage, a ground, and a capacitor to a first node connected to the first power source voltage, and connects one of a second high level voltage and the ground to a second node connected to the second power source voltage.

Abstract: A voltage generator includes a DC/DC converter configured to output a first voltage during a first period of a frame period, the DC/DC converter being connected to a first power voltage and to a second power voltage lower than the first power voltage, a first transistor coupled between the DC/DC converter and an output terminal, the first transistor being configured to be turned on during the first period, a second transistor coupled between the output terminal and a third voltage source, the third voltage source being configured to supply a third voltage lower than the first voltage, and the second transistor being configured to be turned on during a third period of the frame period, and a voltage controller coupled to the output terminal, the voltage controller being configured to limit a voltage of the output terminal.

Abstract: A power supply device includes an SMPS circuit including an electric transformer having first and second stages, the SMPS circuit generating a second stage output voltage using the electric transformer, a power switcher receiving and switching the second stage output voltage to generate a first power voltage having logic high and low levels in one frame, and a PWM controller controlling a voltage level of the second stage output voltage by providing a control signal to the first stage. The first power voltage is simultaneously provided to a plurality of pixels, and a magnitude of the logic low level is increased or decreased according to a magnitude of an image load, where the magnitude of the image load is dependent on a color and a gradation level of an image to be displayed in a next frame.

Abstract: An organic light emitting display device includes a display unit including pixels coupled to scan lines and data lines, first and second power lines coupled to the pixels, a DC-DC converter configured to output first and second power sources to the pixels via the first and second power lines, respectively, and a short-circuit-sensing circuit configured to detect whether a short-circuit between the first and second power lines occurs, and configured to control an operation of the DC-DC converter when the short-circuit is detected, wherein voltage levels of the first and second power sources are configured to be changed in a frame period, the frame period including a reverse voltage application period in which the voltage level of the second power source is higher than that of the first power source.

Abstract: A power supply device includes an SMPS circuit including an electric transformer having first and second stages, the SMPS circuit generating a second stage output voltage using the electric transformer, a power switcher receiving and switching the second stage output voltage to generate a first power voltage having logic high and low levels in one frame, and a PWM controller controlling a voltage level of the second stage output voltage by providing a control signal to the first stage. The first power voltage is simultaneously provided to a plurality of pixels, and a magnitude of the logic low level is increased or decreased according to a magnitude of an image load, where the magnitude of the image load is dependent on a color and a gradation level of an image to be displayed in a next frame.

Abstract: A power supply device includes an SMPS circuit including an electric transformer having first and second stages, the SMPS circuit generating a second stage output voltage using the electric transformer, a power switcher receiving and switching the second stage output voltage to generate a first power voltage having logic high and low levels in one frame, and a PWM controller controlling a voltage level of the second stage output voltage by providing a control signal to the first stage. The first power voltage is simultaneously provided to a plurality of pixels, and a magnitude of the logic low level is increased or decreased according to a magnitude of an image load, where the magnitude of the image load is dependent on a color and a gradation level of an image to be displayed in a next frame.

Abstract: Provided is a display device, including: a display unit including a plurality of pixels that emit light according to a plurality of data signals supplied through a plurality of data lines; a power voltage supplier configured to supply a power voltage to the plurality of pixels; a current detector configured to detect a total current flowing in the plurality of pixels; and a controller configured to receive image information of one frame unit and generate a reference voltage signal corresponding to the image information of one frame unit. The current detector compares the total current and the reference voltage signal and controls driving of the power voltage supplier according to the comparison.

Abstract: A display device having a particular power controller circuit is disclosed. In one aspect, the display includes a plurality of pixels, and a power controller for supplying a first power source voltage and a second power source voltage for providing a driving current of the plurality of pixels wherein the power controller connects at least one of a first high level voltage, a ground, and a capacitor to a first node connected to the first power source voltage, and connects one of a second high level voltage and the ground to a second node connected to the second power source voltage.