摘要:
In a vacuum cleaner, by including a casing having a certain internal space; a suction force generating unit installed in the casing to generate a suction force and discharge sucked air; a head unit combined with the casing to suck impurities on the bottom with air by a suction force of the suction force generating unit or discharge air sucked from the outside; a filter unit for filtering off impurities in air sucked through the head unit or ambient air received from the outside; a flow channel switch connected with the head unit, the filter unit and the suction force generating unit so as to selectively switch a flow channel in order to guide air including impurities sucked through the head unit by the suction force of the suction force generating unit or make ambient air introduced in the flow channel switch flow to the head unit; and plural pipes for providing passages of air flowing in the head unit, the filter unit, the suction force generating unit and the flow channel switch, it is possible to perform not only a function for suctioning those on the surface to be cleaned but also a function for blowing dirt or debris lay on curtains or window frames.
摘要:
A multiwavelength, multistage optical amplifier, which can be arranged in a cascade, substantially increases the degree of automatic power control (APC), multiwavelength APC (MAPC), and multiwavelength automatic gain control (MAGC), for at least two wavelengths. The multiwavelength, multistage optical amplifier or amplifier cascade has at least two spectrally different gain media (GM), i.e. first and second GM, connected in series for amplifying a signal having at least two wavelengths, i.e. first and second wavelengths. The first GM may be aluminosilicate erbium doped fiber, the second GM may be germanosilicate erbium doped optical fiber. The gain at the first wavelength is smaller than the gain at the second wavelength, while the signal power at the first wavelength is larger than the signal power at the second one, and vice versa. This may automatically compensate for loss tilt. The gain media may be homogeneously broadened.
摘要:
The present disclosure provides an automatic electric punching apparatus that can automatically punch documents or paper sheets by lowering a screw punch blade by means of a screw while being rotated in conjunction with driving of a motor due to switching.
摘要:
Disclosed is an electrophoretic display and a method for driving the electrophoretic display. The method for driving the electrophoretic display, which includes a first electrode, a second electrode, and an electrophoretic layer including electrophoretic particles disposed in a plurality of pixels receiving the voltage for driving from the first electrode and the second electrode and provided between the first electrode and the second electrode includes applying a reset voltage to the pixels, applying a reset compensation voltage including reversed polarity to the reset voltage to the pixels, applying an image display voltage including the same or different polarity during a predetermined time between the neighboring pixels, and applying an image display compensation voltage including reversed polarity to the image display voltage to the pixels during a predetermined time. The foregoing method provides a potential distribution which is symmetrical in the boundary region between the neighboring pixels such that the display size of the real image of each of the pixels is uniform and an afterimage may be prevented, thereby improving the display performance.
摘要:
A display substrate includes a transparent substrate, a gate line formed on the transparent substrate, a data line crossing the gate line, a thin film transistor electrically connected to the gate line and the data line, and a pixel electrode. The pixel electrode includes a body electrode section electrically connected to the thin film transistor and a plurality of protruding electrodes protruding from the body electrode section. Each of the protruding electrodes includes a trapezoidal electrode having two sides that are inclined with respect to a protrusion direction that is a lengthwise direction of the body electrode section.
摘要:
An energy storage apparatus has developed for railway vehicles by adopting a bidirectional DC-DC converter to increase the efficiency of charge/discharge, comprising that; a power receiving unit, filter unit, charging unit storage unit having a plurality of super-capacitors, capacitor monitoring unit, a plurality of bidirectional DC-DC converters arranged in parallel, and voltage detector electrically connected to the filter unit, current detector for detecting the currents flowing. The controller further comprises; an analog interface board, signal identifying board, signal control board, digital output contact unit, communicating board, PWM control board, optical output board, external gate driver. The PWM control board includes; a sensor input circuit, A/D converter, calculation unit, calculation control processor, and power monitoring unit. It is easy to add a storage unit including supercapacitor in a form of box module for increasing capacity and efficient of charging/discharging of the storage unit through various sensors and signal checking.
摘要:
A backlight assembly includes; a plurality of light guide blocks disposed substantially in parallel with each other along a first direction, each of the plurality of light guide blocks including; a light guide plate (“LGP”) having a wedge-shape decreasing in thickness from a first side thereof to a second side thereof, and a light source unit disposed facing a side surface of the LGP, and a light source driving unit which individually controls the light source units of the plurality of light guide blocks to emit light via a local dimming method.
摘要:
A scan driver drives a display device having a plurality of gate lines transferring scan signals, and a plurality of source lines transferring data signals. The scan driver includes a shift register and a multiple signal applying unit. The shift register includes a plurality of cascade-connected stages, each stage having an output terminal electrically connected to a respective one of the plurality of gate lines. The multiple signal applying unit applies a sub scan signal and a main scan signal. The sub scan signal and the main scan signal sequentially activate each of the plurality of gate lines. Therefore, the scan lines receive the scan signal twice, so that the liquid crystal capacitors electrically connected to the gate lines receive the data voltage twice. As a result, even though the time for charging the liquid crystal capacitors may be reduced, the liquid crystal capacitors may be fully charged to enhance display quality.
摘要:
A backlight assembly includes a plurality of lamps, a receiving container, a diffuser plate and a plurality of holding members. The lamps generate a light. The receiving container receives the lamps. The receiving container includes a bottom portion and a side portion protruded from a side of the bottom portion. The diffuser plate is over the lamps to diffuse the light generated from the lamps. The holding members are engaged with the bottom portion. Each of the holding members has a lamp holding portion that holds one of the lamps. 10 The lamp holding portion has an opening for receiving the lamp. The opening is inclined by a first angle with respect to a normal line of the bottom portion. Therefore, the lamps are securely combined with the lamp holding portion, and the lamps are easily assembled to protect the lamps from an externally provided impact.
摘要:
A filter device for a vacuum cleaner includes a casing having a collecting space therein, a suction opening through which air including dust is sucked, formed eccentrically at one side so that sucked air can be rotated and a discharge opening through which purified air is discharged. A filter is installed at an internal space of the casing, for filtering dust from air sucked through the suction opening. A filter cleaning unit is disposed at an outer circumferential surface of the filter, for cleaning the filter by being rotated by a rotation force of air sucked through the suction opening. A rotation restrainer is provided for restraining rotation of the filter cleaning unit when the filter cleaning unit reaches a topmost position. Accordingly, fine dust attached to the filter in cleaning is removed so that a channel of the filter can be prevented from being closed.