Patent application number | Description | Published |
20080304046 | Imaging Apparatus for Infrared Rays Nonlinear Molecular Vibrational Microscopy - The present invention relates to an imaging apparatus for infrared rays nonlinear molecular vibrational microscopy. The imaging apparatus comprises a pump beam source for generating an infrared pump beam; a probe beam source for generating a probe beam; a beam combiner which synchronizes temporally and overlaps spatially the pump beam and probe beam on the same axis; a scanner for two-dimensionally scanning the combined pump beam and probe beam; a first optical focusing system for focusing the scanned pump beam and probe beam on a local point of the sample; a first collecting optical system for collecting the beam of which phase is shifted by interaction with the sample and forming a parallel beam; a first dichroic beam splitter for removing the infrared pump beam out of the parallel beam and splitting the probe beam of which phase is shifted; a reference interferometer for splitting a part of the probe beam out of the beams scanned by the scanner and generating a reference probel beam; an interferometric beam combiner for combining the probe beam having the shifted phase and the reference probe beam; a photodetector for detecting an intensity of a molecular vibrational beam signal from the combined probe beam; and a data analyzer for acquiring the detected signals and extracting a spectrospcopic information corresponding to the strength of molecular vibrational coherence of the sample. | 12-11-2008 |
20080304047 | Imaging Apparatus for IR Four-Wave Mixing Polarization Microscopy - The present invention relates to an imaging apparatus for IR four-wave mixing polarization microscopy. The imaging apparatus comprises a pump beam source for generating an infrared pump beam; a probe beam source for generating a probe beam (search beam); a polarizer for linearly polarizing the pump beam and probe beam; a beam combiner which synchronizes temporally and overlaps spatially the polarized pump beam and probe beam on the same axis; a scanner for two-dimensionally scanning the combined pump beam and probe beam; an optical focusing system for focusing the scanned pump beam and probe beam on a local point of the sample; a collecting optical system for collecting the beam which is formed by that the focused beams are interacted with the sample and of which phase is anisotropically retarded by nonlinear birefringence of the sample and forming a parallel beam; a dichroic beam splitter for removing the infrared pump beam out of the parallel beam and splitting the probe beam of which phase is anisotropically retarded; a polarizing beam splitter for converting the split and ansotripically phase-retarded probe beam into linerly polarized beams having their axes perpendicular to each other; a photodetector for detecting an intensity of each of the converted linerly polarized beams; a polarization differential detector for detecting a polarization difference based on the detected intensities of the linerly polarized beams; and a data analyzer for acquiring the detected polarization difference signal and extracting a spectrospcopic information corresponding to the strength of molecular vibrational coherence of the sample. | 12-11-2008 |
20100123889 | SUPER-RESOLUTION LITHOGRAPHY APPARATUS AND METHOD BASED ON MULTI LIGHT EXPOSURE METHOD - Disclosed herein is a super-resolution lithography apparatus and method based on a multiple light exposure method. The super-resolution lithography apparatus comprises a photographic medium having energy levels of a first ground state, a second ground state, a first excited state, a second excited state and a quenching state; a first light source inducing energy level transition between the first ground state and the first excited state of the photographic medium; a second light source inducing energy level transition between the second ground state and the first excited state of the photographic medium; and a third light source inducing energy level transition between the second ground state and the second excited state of the photographic medium. Accordingly, the resolution of lithography can be improved simply by using a photographic medium having a simple structure and conventional laser beams and increasing the number of exposure steps. Furthermore, a multiple photon absorber that is difficult to obtain, a medium having a complicated energy level and a high-efficiency quantum optical light are unnecessary, and thus economic efficiency is improved. | 05-20-2010 |
20100174145 | SPECTRALLY ENCODED COHERENT ANTI-STOKES RAMAN SCATTERING ENDOSCOPE - Disclosed is a spectrally encoded coherent anti-Stokes Raman scattering (CARS) endoscope that is capable of spatially encoding spectral dispersions of two light sources having frequency difference as much as a Raman shift and overlapping two laser beams on a position where a sample to be measured is placed, thereby acquiring a spatial distribution of CARS signals. | 07-08-2010 |
Patent application number | Description | Published |
20080292827 | CAR MAT MODULE - A car mat module includes a floor carpet with at least one depression, and at least one car mat configured and dimensioned to be seated into the depression. The thickness of the depression may be substantially equal to the thickness of the car mat. The depression may include at least one slot and the car mat may include at least one protrusion configured and dimensioned to be inserted into the slot. At least one hook may be provided on the car mat or the floor carpet, configured to secure the floor mat and the carpet together. The at least one slot may be two slots disposed along opposite edges of the depression. Each protrusion may be a plurality of co-linear protrusions disposed along a single edge of the car mat, and each slot may be a plurality of co-linear slots disposed along a single edge of the depression. | 11-27-2008 |
20110025102 | JOINT STRUCTURE FOR FIXING BETWEEN SUNROOF AND HEADLINER - A joint structure for fixing between a sunroof and a headliner, may include a headliner defining an opening, wherein a portion of the headliner around the opening protrudes and is curved upwards to define the opening, and the headliner has a face fabric attached to a surface thereof, a bracket attached to an upper end portion and a lower portion of the headliner, outside of the opening, wherein the bracket has a support end portion protruding in a direction opposite to the opening, a clip into which the support end portion of the bracket is selectively fitted, and a sunroof frame coupled with an upper portion of the clip, wherein the sunroof is provided on the sunroof frame. | 02-03-2011 |
20130134734 | Cargo Screen of Vehicle Luggage Room - A cargo screen of a vehicle luggage room, the cargo screen may include a housing mounted at an upper portion of the vehicle luggage room in a horizontal direction and having a central portion to be foldable, a roller rotatably installed in the housing and having a cut central portion to be foldable, and a screen wound around an outer peripheral surface of the roller in the housing through a cut hole thereof or selectively unwound to the outside of the housing to cover the vehicle luggage room, and having a cut central portion to be foldable. | 05-30-2013 |
20130146233 | CARGO SCREEN STRUCTURE - A cargo screen structure may include a housing mounted at an upper portion of a vehicle luggage room in a horizontal direction, a shaft rotatably provided in the housing, a screen provided on an outer peripheral surface of the shaft and wound and unwound from the housing, and a switch provided in the housing and set to be turned on/off according to a winding amount of the screen around the outer peripheral surface of the shaft. | 06-13-2013 |
Patent application number | Description | Published |
20100038633 | Organic light emitting diode - Provided is an organic light emitting diode including: a first electrode; a second electrode; an organic layer between the first electrode and the second electrode; and a luminous efficiency improvement layer disposed on a surface of the first electrode facing away from the organic layer or a surface of the second electrode facing away from the organic layer, wherein the luminous efficiency improvement layer includes a porphyrazin derivative, a phthalocyanine derivative, a naphthalocyanine derivative, or a combination of at least two compounds of the foregoing. | 02-18-2010 |
20100039026 | Organic light emitting diode employing luminescent efficiency improvement layer - Provided is an organic light emitting diode employing a luminescent efficiency improvement layer containing a compound represented by Formula 1 below: | 02-18-2010 |
20100039029 | Organic Light Emitting Diode Including Light-Efficiency-Improvement Layer - An organic light emitting diode is disclosed, and includes a light-efficiency-improvement layer containing a compound represented by Formula 1: | 02-18-2010 |
20110043095 | MASTER GLASS HAVING STRUCTURE CAPABLE OF PREVENTING DAMAGE CAUSED BY STATIC ELECTRICITY - There is provided a master glass having a structure capable of preventing damage caused by static electricity. The master glass is a substrate on which a deposition process is experimentally performed by being experimentally loaded loading the master glass into a deposition apparatus before starting the deposition process of the substrate for electronic devices. In one embodiment, a master glass includes first conductive patterns and a second conductive pattern. The first conductive patterns are formed to correspond to a deposition pattern required in a substrate for electronic devices. The second conductive pattern electrically connects all the first conductive patterns to one another. | 02-24-2011 |
20110084254 | POLYMER AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME - A polymer and an organic light-emitting device including the polymer. An example of the polymer is | 04-14-2011 |
20110240968 | Organic light-emitting device - An organic light-emitting device including a substrate; a first electrode on the substrate, the first electrode including a first surface and a second surface opposite to the first surface; an organic layer on the first electrode, the organic layer being adjacent to the first surface of the first electrode; a second electrode on the organic layer, the second electrode including a first surface adjacent to the organic layer and a second surface opposite to the first surface; and a luminescent efficiency improvement layer on at least one of the second surface of the first electrode and the second surface of the second electrode, the luminescent efficiency improvement layer including a condensed-cyclic compound represented by Formula 1, below: | 10-06-2011 |
20110240975 | POLYMER COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME - A polymer represented by Formula 1 below: | 10-06-2011 |
20110240979 | CONDENSED-CYCLIC COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME - A condensed-cyclic compound and an OLED including the same, the condensed-cyclic compound represented by Formula 1 below: | 10-06-2011 |
20120013246 | DENDRIMER AND ORGANIC LIGHT-EMITTING DEVICE USING THE SAME - A dendrimer and an organic light-emitting device including an organic layer having the dendrimer. | 01-19-2012 |
20120013247 | DENDRIMER AND ORGANIC LIGHT-EMITTING DEVICE USING THE SAME - A dendrimer and an organic light-emitting device including an organic layer having the dendrimer. | 01-19-2012 |
20120044165 | Touch screen panel - The present embodiments provide a touch screen panel. The touch screen panel may include: a plurality of first sensing patterns connected to each other in a long side direction of a screen, the plurality of first sensing patterns having at least one indenting unit inwardly indented from respective sides of a polygon; and a plurality of second sensing patterns connected to each other in a short side direction of the screen, the second sensing patterns having at least one protrusion protruding outwardly from respective sides of a polygon. Vertical and horizontal edges of the first sensing patterns and the second sensing patterns are tilted by a predetermined angle. | 02-23-2012 |
20120097966 | Thin Film Transistor, Organic Light Emitting Diode (OLED) Display Including the Same, and Manufacturing Methods of Them - The present invention relates generally to a thin film transistor, an organic light emitting diode (OLED) display including the same, and manufacturing methods of them. The thin film transistor comprises: a substrate; a gate electrode disposed on the substrate; a gate insulating layer disposed on the gate electrode; a semiconductor layer disposed on the gate insulating layer; an inter layer dielectric disposed on the entire surface of the substrate; and source and drain electrodes disposed on the inter layer dielectric and connected to the semiconductor layer, and in which the gate electrode is disposed so as to correspond to the entire surface of the semiconductor layer, and a manufacturing method thereof. The organic light emitting diode (OLED) display comprises the elements of the thin film transistor described above, and also includes an insulating film disposed on the entire surface of the substrate, and a first electrode, an organic layer, and a second electrode disposed on the insulating film, the first electrode being electrically connected to any one of the source and drain electrodes, and the gate electrode is disposed so as to correspond to the entire surface of the semiconductor layer. | 04-26-2012 |
20120286246 | CONDENSED-CYCLIC COMPOUND, ORGANIC LIGHT-EMITTING DEVICE COMPRISING THE SAME, AND FLAT PANEL DISPLAY APPARATUS - A condensed-cyclic compound represented by Formula 1 below, an organic light-emitting device including the same, and a flat panel display apparatus including the organic light-emitting device: | 11-15-2012 |
20120286247 | CONDENSED-CYCLIC COMPOUND, ORGANIC LIGHT-EMITTING DEVICE COMPRISING THE SAME, AND FLAT PANEL DISPLAY APPARATUS - A condensed-cyclic compound represented by Formula 1 below, an organic light-emitting device including the same, and a flat panel display apparatus including the organic light-emitting device: | 11-15-2012 |
20120286249 | CONDENSED-CYCLIC COMPOUND, ORGANIC LIGHT-EMITTING DEVICE COMPRISING THE SAME, AND FLAT PANEL DISPLAY APPARATUS INCLUDING THE DEVICE - A condensed-cyclic compound is represented by Formula 1 below. An organic light-emitting device includes the condensed-cyclic compound. A flat panel display apparatus includes the organic light-emitting device. | 11-15-2012 |
20120326138 | HETEROCYCLIC COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME - A heterocyclic compound represented by Formula 1 or Formula 2 below, an organic light-emitting device including the heterocyclic compound, and a flat display device including the organic light-emitting device: | 12-27-2012 |
20140239261 | ORGANIC LIGHT EMITTING DIODE DEVICE - An organic light emitting diode device includes an anode and a cathode facing each other, and an emission layer interposed between the anode and cathode, the emission layer including a compound represented by the following Chemical Formula 1 and a compound represented by the following Chemical Formula 2: | 08-28-2014 |
20140332769 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode (OLED) display with electrostatic discharges protection is disclosed. One inventive aspect includes a substrate including a pixel area and a peripheral area, an organic light emitting diode (OLED) formed at the pixel area, a driving circuit formed at the peripheral area, a shield layer formed with the same layer as the first electrode, and a first shield voltage line connected to the shield layer. The first shield voltage line transmits a shield voltage to the shield layer. The shield layer includes a plurality of sub-shield layers and covers the driving circuit to prevent an external electrostatic discharge. | 11-13-2014 |
20150017753 | THIN FILM DEPOSITION APPARATUS AND MANUFACTURING METHOD OF ORGANIC LIGHT EMITTING DIODE DISPLAY USING THE SAME - The example embodiments provide a thin film deposition apparatus for deposition of an organic material having a low volatility characteristic, and a method for manufacturing an OLED display using the same. A thin film deposition apparatus includes a crucible assembly evaporating an organic material toward a substrate, and a pattern mask provided in one side of the substrate facing the crucible assembly. The crucible assembly includes a crucible coupled with the heater and containing an organic material therein, and a guide pipe coupled to an entrance of the crucible and forming an inner space extended in one direction toward the substrate from the entrance of the crucible. | 01-15-2015 |
20150041791 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode (OLED) display includes a substrate including a pixel area and a surrounding peripheral area. The pixel area includes at least one pixel including an organic light emitting element. The OLED display includes a common voltage line disposed in the peripheral area and configured to transmit a common voltage to the pixel area, a barrier rib disposed on the substrate and covering one side of the common voltage line, a protection member covering another side of the common voltage line, at least one thin film transistor (TFT) disposed in the pixel area, a first electrode disposed in the pixel area and connected to the at least one TFT, an organic emission layer disposed on the first electrode, a second electrode disposed on the organic emission layer and connected to the common voltage line, and an encapsulation layer disposed on the protection member and the second electrode. | 02-12-2015 |
20150162539 | ORGANIC LIGHT-EMITTING DEVICE - An organic light-emitting device including a first electrode, a second electrode and an organic layer disposed between the first electrode and the second electrode is provided. | 06-11-2015 |
Patent application number | Description | Published |
20080311440 | FUEL CELL SYSTEM AND METHOD OF OPERATING THE SAME - A fuel cell system includes a power unit that generates power using a fuel; a fuel storage unit that stores the fuel; a fuel supply device that conveys the fuel from the fuel storage unit to the power unit; and a control unit that controls the supply of the fuel and the generation of power. The fuel supply device includes a fuel supply control device that controls the supply of fuel according to a signal generated by the control unit. The control unit includes a fuel control unit that generates the signal according to the information of the fuel storage unit and the state information of the power unit. | 12-18-2008 |
20090068522 | MONOPOLAR TYPE MEMBRANE ELECTRODE ASSEMBLY HAVING SENSING ELEMENT - A monopolar membrane electrode assembly (MEA) for a fuel cell, for example, includes: an electrolyte membrane; anode and cathode electrodes formed on opposite surfaces of the electrolyte membrane, respectively; current collecting bodies that form electrical paths of electricity generated from an electricity generation reaction between the anode and cathode electrodes and the electrolyte membrane; and sensing elements to measure changes in operation state conditions during electricity generation and electrical connection. Since temperature and fuel concentration in the monopolar MEA having the above structure are detected on a real time basis, appropriate action can be taken whenever an abnormal operation thereof is detected. | 03-12-2009 |
20090110975 | HYDROGEN GENERATOR AND FUEL CELL USING THE SAME - A hydrogen generator and a fuel cell using the same includes: a first container containing an aqueous solution of alkaline metal carbonate or bicarbonate; a second container containing a metal hydride; and a supply unit disposed between the first container and the second container. The hydrogen generator has a high hydrogen generating rate, can provide a fuel cell with a high energy density, and the amount of hydrogen generated thereby is easy to control. | 04-30-2009 |
20090155654 | HEAT RECOVERY APPARATUS AND FUEL CELL HAVING THE SAME - Provided are a heat recovery apparatus recovering heat generated from a membrane electrode assembly (MEA) and transmitting the heat to a fuel spreader so that a temperature difference between the MEA and the fuel spreader inside a fuel cell is reduced, and a fuel cell having the heat recovery apparatus. The fuel spreader supplies fuel having a uniform concentration to the MEA through the heat recovery apparatus, so that a fuel cell having a reduced total volume, a stable performance, and increased energy efficiency can be provided. | 06-18-2009 |
20090176140 | FUEL CELL PROVIDING IMPROVED DISPOSING STRUCTURE FOR UNIT CELLS - A fuel cell including a plurality of unit cells that each includes an anode, an electrolyte membrane, and a cathode. The unit cells are stacked together, such that the unit cells form rows and furrows. The fuel cell can further include an anode frame to support an anode side of the fuel cell stack, and a cathode frame to support a cathode side of the fuel cell stack. The fuel cell can include reinforcing members to support either of the frames. | 07-09-2009 |
20130321726 | FLAT PANEL DISPLAY - A flat panel display (FPD) includes a substrate, a plurality of pixel units on the substrate, each of the pixel units including a display element, a thin film transistor (TFT) electrically coupled to the display element, and a capacitor electrically coupled to the TFT and including electrodes, wherein the electrodes of the capacitor of a first pixel unit of the pixel units are extended to an adjacent pixel unit of the pixel units. | 12-05-2013 |
Patent application number | Description | Published |
20080290831 | FUEL CELL SYSTEM COMPRISING BATTERY AND METHOD OF CONSUMING RESIDUAL FUEL IN THE FUEL CELL SYSTEM - A fuel cell system having a back-up battery and a method of consuming residual fuel in the fuel cell system in which the fuel cell system includes a fuel cell, a system controller, a back-up battery, a converter, a fuel supply control, and a driver to drive the fuel supply control, and a charger disposed between the converter and a load. A power output end of the charger is directly connected to the back-up battery via a switch. The converter includes a first converter connected to the back-up battery and a second converter connected to the fuel cell, and the first and second converters are commonly connected to the charger. | 11-27-2008 |
20130300315 | SWITCH CONTROLLER, POWER SUPPLY DEVICE COMPRISING THE SAME, AND DRIVING METHOD OF THE POWER SUPPLY DEVICE - The power supply device includes a power switch including one terminal to which an input voltage is transferred; an inductor including one terminal connected to another terminal of the power switch; a diode connected between a ground and a floating ground; a sensing resistor connected between the floating ground and the one terminal of the inductor. A switch controller compares a modulation sensing voltage depending on a sensing voltage generated from the sensing resistor with a high peak reference and a low peak reference when a LED string is connected between an inductor and the ground. The switch controller controls a switching operation of a power switch according to the comparison result. The high peak reference and the low peak reference are references for controlling an upper limit and a lower limit of an LED current flowing through the LED string, respectively. | 11-14-2013 |
20130300390 | SWITCH CONTROL CIRCUIT, COUPLED INDUCTOR BOOST CONVERTER INCLUDING THE SAME, AND DRIVING METHOD OF THE COUPLED INDUCTOR BOOST CONVERTER - The present invention related to a switch control circuit, a coupled inductor boost converter including the same, and a driving method thereof. The coupled inductor boost converter includes a first inductor connected between an input voltage and a first node, a second inductor connected between the first node and a second node, and a power switch connected between the first node and a ground, and a switch control circuit. The switch control circuit receives a voltage of the second node and turn on the power switch by using the voltage of the second node at a time when a voltage of the first node becomes a zero voltage. | 11-14-2013 |
20140049236 | SWITCH CONTROL CIRCUIT, CONVERTER INCLUDING THE SAME AND DRIVING METHOD THEREOF - Disclosed are a switch control circuit, a converter including the same, and a driving method thereof. The converter includes an inductor for storing energy of an input end and providing the same to an output end, a first switch coupled between the inductor and a ground, and a switch control circuit for controlling the first switch by comparing a ramp voltage that corresponds to a current that flows through the first switch and a first voltage that corresponds to an output voltage of the output end. The switch control circuit compares the ramp voltage and the first reference voltage to change the slope of the ramp voltage. | 02-20-2014 |
Patent application number | Description | Published |
20120020134 | SWITCH CONTROL DEVICE, POWER SUPPLY DEVICE COMPRISING THE SAME AND SWITCH CONTROL METHOD - Provided are a switch control device, a switch control method, and a power supply device.
| 01-26-2012 |
20120169313 | SWITCH CONTROL CIRCUIT, CONVERTER USING THE SAME, AND SWITCH CONTROL METHOD - The present invention relates to a switch control circuit, a switch control method, and a converter using the same. An input voltage of a converter is provided to an inductor, and an output voltage is generated by an inductor current caused by the input voltage. A switch control circuit for controlling a switching operation of a power switch connected to the inductor to control the inductor current senses a drain current flowing to the power switch while the power switch is turned on, and controls a slope of a sawtooth wave signal for determining a turn-off time of the power switch according to the sensed drain current. | 07-05-2012 |
20120170335 | SWITCH CONTROL CIRCUIT, CONVERTER USING THE SAME, AND SWITCH CONTROLLING METHOD - The present invention relates to a switch control circuit, a switch control method, and a converter using the same. | 07-05-2012 |
20120176055 | APPARATUS FOR CONTROLLING BLEED SWITCH, POWER SUPPLY, AND METHOD FOR DRIVING POWER SUPPLY - A power supply has a TRIAC dimmer, and an AC-DC converter connected to the TRIAC dimmer. The AC-DC converter has a power switch, a bleed switch, and a controller. The controller turns off the bleed switch in a first time duration and turns on the bleed switch in a second time duration. Magnitude of a current of the power switch in the first time duration is larger than magnitude of a current of the power switch in the second time duration. Magnitude of a current of the bleed switch in a third time duration within the second time duration is smaller than magnitude of a current of the bleed switch in a fourth time duration within the second time duration. | 07-12-2012 |
20120188670 | SWITCH CONTROL CIRCUIT, SWITCH CONTROLLING METHOD, AND POWER SUPPLY DEVICE USING THE SWITCH CONTROL CIRCUIT - Embodiments of the present invention relate to a switch control circuit, a switch control method, and a power supply device using the same. | 07-26-2012 |
20120248997 | APPARATUS AND METHOD FOR DRIVING LIGHT EMITTING DIODE - An apparatus for driving an LED device having a plurality of LED channels is disclosed. Each LED channel has a plurality of LEDs connected in series. A power converter converts an input voltage into an output voltage and outputs the output voltage to an output terminal that is connected to first terminals of the plurality of LED channels. A plurality of current controllers are connected to second terminals of the plurality of LED channels, respectively. Each current controller controls a current of a corresponding LED channel. A detection controller determines a detection time based on voltages of the second terminals of the plurality of LED channels. A state detector detects the open-circuited states of the plurality of LED channels based on voltages of the second terminals of the plurality of LED channels at the detection time. | 10-04-2012 |
20130027013 | ERROR VOLTAGE GENERATION CIRCUIT, SWITCH CONTROL CIRCUIT COMPRISING THE SAME, AND POWER FACTOR CORRECTOR COMPRISING THE SWITCH CONTROL CIRCUIT - The present invention relates to an error voltage generation circuit, a switch control circuit, and a power factor corrector. The error voltage generation circuit generates an error voltage using an error input voltage corresponding to an output voltage of a power factor corrector and a soft start voltage. The error voltage generation circuit samples an error input voltage at an AC input supply time point of the power factor corrector and holes a sampling voltage according to the sampled error input voltage during a soft start period. The error voltage generation circuit generates a soft start voltage increasing from a start voltage corresponding to the sampling voltage. The switch control circuit controls a duty of a power switch of the power factor corrector using the error voltage. | 01-31-2013 |
20130128640 | SWITCH CONTROLLER, SWITCH CONTROL METHOD, AND POWER SUPPLY DEVICE COMPRISING THE SWITCH CONTROLLER - The present invention relates to a switch controller, a switch control method, and a power supply including the switch controller. An exemplary embodiment of the present invention detects an on-time of a power switch of the power supply and decreases a frequency of a clock signal according to a period during which the detected on-time is shorter than or equal to the minimum on-time. According to the exemplary embodiment, switching of the power switch is controlled according to a clock signal, and the minimum on-time is an on period of the power switch that cannot be shortened. | 05-23-2013 |