Patent application number | Description | Published |
20090070689 | METHOD FOR ALARMING THE UPDATE OF THE CLASSIFIED OBJECTS HAVING THE PROPERTY AND COMPUTER READABLE MEDIUM PROCESSING THE METHOD - Disclosed is a method for editing topical classified objects having properties, comprising the steps of creating objects classified according to a user's interest field when the user inputs information on the objects; creating posts in the created objects; executing a web browser, visiting a web site, and clicking a contents input button on the web site; selecting an area on a web page of the web site and reading data of the area; and generating a separate writing window according to a contents storing instruction, adding the read contents to the generated writing window, and transmitting the writing window to which the read contents are added to an object of the user. | 03-12-2009 |
20090085140 | FINGER TYPE PHOTODIODE AND METHOD OF MANUFACTURING THE SAME - Provided are a finger type photodiode and a method of manufacturing the same, which can reduce noise by forming a shallow doping layer. The finger type photodiode includes a bottom substrate supporting layers to be formed thereon, an epitaxial layer formed on the bottom substrate, a finger doping layer formed in a finger shape on a top surface of the epitaxial layer, and a shallow doping layer formed with a shallow depth on an externally exposed top surface of the epitaxial layer and a top surface of the finger doping layer. Since the dangling bond generated on the epitaxial layer and the finger doping layer is reduced, noise can be reduced, thereby improving the light efficiency and reliability of the photodiode. | 04-02-2009 |
20090150798 | METHOD FOR PROVIDING THE SYMPATHY OF THE CLASSIFIED OBJECTS HAVING THE PROPERTY AND COMPUTER READABLE MEDIUM PROCESSING THE METHOD - Disclosed is a method for providing a degree of matching between topical classified objects having properties, including the steps of inputting object information from a user and generating objects classified according to the user's interest field; generating posts in the generated objects; and numerically expressing a degree of matching with objects of other users. | 06-11-2009 |
20090171984 | APPARATUS AND METHOD FOR INTERLINKING THE CLASSIFIED OBJECTS HAVING THE PROPERTY AND COMPUTER READABLE MEDIUM PROCESSING THE METHOD - Disclosed is an apparatus for interlinking topical classified object shaving properties. The apparatus include an interest Tong information database for storing one or more object information and one or more post information, which are classified according to interest fields requested by a user through a web server; a buddy information database for storing information on connection between the objects generated by the user and other objects; and an interest Tong service server for providing the user with information on the other objects connected to the objects generated by the user when the user accesses the interest Tong service server. | 07-02-2009 |
20110292029 | Apparatus and method for driving e-paper panel - Disclosed herein are an apparatus and a method for driving an e-paper panel. The e-paper panel driving apparatus includes a DC/DC converter that converts and outputs DC voltage to be input into a preset voltage and supplies the output voltage as a driving voltage of an e-paper panel; a sensing module that senses load conditions of the e-paper panel; and a control module that varies the driving frequency of the DC/DC converter according to the load conditions of the e-paper panel sensed by the sensing module. According to the present invention, the driving clock of the DC/DC converter that supplies the driving voltage to the e-paper panel is varied in consideration of the load conditions of the e-paper panel, thereby making it possible to prevent an image quality of the e-paper panel from being degraded due to unstable power supply, while simultaneously minimizing unnecessary power consumption of the e-paper panel driving apparatus. | 12-01-2011 |
20110317536 | CURRENT DRIVING CIRCUIT AND LIGHT STORAGE SYSTEM HAVING THE SAME - Disclosed herein are a current driving circuit and a light storage system having the same. The current driving circuit includes a plurality of channel circuits that include a first transistor into which the input current flows, a second transistor generating the output current by mirroring the input current, a plurality of switches connected between the first and second transistors in parallel and optionally electrically connecting the first and second transistors in response to the control signals, a controller optionally activating the control signals each corresponding to the switches according to the magnitude of the input current; and an adder that adds output currents of the channel circuits to generate driving current. The current driving circuit can stably supply the driving current while preventing a delay in the driving current. | 12-29-2011 |
Patent application number | Description | Published |
20120299490 | LED CIRCUIT - There is provided an LED circuit. The LED circuit may include 2N+2 light emitting units connected between a 2K−1-th node and a 2K-th node among 4N+4 (N is a natural number) nodes including a first node supplied with input voltage (K is all natural numbers equal to or smaller than 2N+2); 2N+2 switches connected between a 2K-th node and a ground (K is all natural numbers equal to or smaller than 2N+2); 2N+1 switches connected between a 2L−1-th node and a 2L+1-th node and 2N+1 switches connected between a 2L-th node and a 2L+1-th node (L is all natural numbers equal to or smaller than 2N+1); and N switches connected between the first node and a 4M+1-th node (M is all natural numbers equal to or smaller than N). | 11-29-2012 |
20120299497 | LED CIRCUIT - There is provided an LED circuit including a light emitting unit including a plurality of light emitting diodes; and a switching unit switching to apply only positive voltage of an AC power supply to an anode of the light emitting unit. Through this, the LED circuit can reduce complexity of a driving circuit. Further, lifespan and efficiency of the LED circuit may be improved since an electrolytic capacitor and a bridge circuit are not used. Further, any one light emitting diode may be prevented from determining the lifespan of all of the light emitting diodes since all of the light emitting diodes are driven at all times, thereby improving the lifespan of the light emitting diode. | 11-29-2012 |
20120306396 | LED DRIVING APPARATUS AND METHOD - There are provided an LED driving apparatus and an LED driving method thereof. The LED driving apparatus includes: a light emitting unit including one or more LEDs, a rectifying unit rectifying an input signal to generate a first signal; a signal conversion unit inverting a waveform of a first signal to generate a second signal; and an operation unit arithmetically operating the first and second signals. A plurality of AC signals each having a different waveform are arithmetically operated to generate a signal having a small amount of a ripple component, and an LED is driven by the signal, thus preventing a lifespan of the LED from being shortened by omitting a smoothing electrolytic capacitor, one of main causes shortening the lifespan of an LED driving circuit. | 12-06-2012 |
20120319605 | ILLUMINATION DRIVING APPARATUS - A fixture-compatible, dimmable illumination driving apparatus including: a rectifying unit rectifying a phase-controlled waveform of an alternating current (AC) power; a comparing unit comparing an output waveform of the rectifying unit with a first voltage according to a preset reference clock; a reference voltage generating unit generating a reference voltage corresponding to the number of high signals higher than the first voltage among outputs of the comparing unit during one cycle of the output waveform; and a pulse width modulation (PWM) signal generating unit generating a PWM signal from the reference voltage and a feedback voltage. | 12-20-2012 |
20120319609 | LIGHT EMITTING DIODE DRIVER HAVING OFFSET VOLTAGE COMPENSATING FUNCTION - There is provided a light emitting diode (LED) driver having an offset voltage compensating function compensating for an offset voltage generated at the time of driving of an LED, the LED driver including: a driving unit detecting a current flowing in an LED unit having at least one LED, as a voltage and controlling the current flowing in the LED unit according to a comparison result between the detected voltage and a reference voltage having a preset voltage level; and an offset compensating unit integrating a voltage difference between the detected voltage and the reference voltage and adding or subtracting a compensating current according to an integration result to thereby compensate for an offset. | 12-20-2012 |
20130033191 | LIGHT EMITTING DIODE DRIVING DEVICE AND METHOD THEREOF - There are provided a light emitting diode (LED) driving device allowing for an increase in an LED driving rate by discharging a charge stored in a capacitor during a certain period of time and a method thereof. The LED driving device includes: a driving unit detecting a current, as a voltage, the current flowing across an LED unit having at least one LED, controlling the current flowing across the LED unit according to a comparison result between the detected voltage and a reference voltage having a pre-set voltage level, and having a capacitor stabilizing an operation of the LED unit when the LED unit is driven; and a discharging unit discharging a charge stored in the capacitor during a pre-set discharge time when the LED unit is initially driven. | 02-07-2013 |
20130162144 | LIGHT EMITTING DIODE DRIVING APPARATUS - Provided is an LED driving apparatus. The LED driving apparatus includes a plurality of LED groups each comprising one or more diodes, a switch group comprising a plurality of switch units connected respectively to the LED groups to drive the connected LED group when a control signal is activated, and a switch controlling unit configured to compare an input voltage of the LED groups with an output voltage of the LED groups, calculate a comparison value, and generate the control signal according to the comparison value. Accordingly, the LED driving apparatus drives the LED groups selectively according to the difference between the input voltage of the LED group and the output voltage of the LED group, thereby overcoming the problem of heat generation by forward voltage distribution. | 06-27-2013 |
20130162154 | DRIVING APPARATUS FOR LIGHT EMITTING DIODE - There is provided a driving apparatus for a light emitting diode (LED) comparing a rectified power voltage level with an LED current to limit current applied to an LED, thereby reducing the amount of heat generated therein. The driving apparatus for an LED includes a detecting unit detecting a voltage level of rectified power; and a driving unit comparing a level of current flowing in an LED unit having at least one LED with detection results from the detecting unit, and limiting current applied to the LED unit to drive the LED unit according to comparison results. | 06-27-2013 |
20130257305 | LIGHT EMITTING DIODE DRIVING APPARATUS - There is provided a light emitting diode driving apparatus satisfying regulations for current transferred to a light emitting diode. The light emitting diode driving apparatus includes: a power supplying unit receiving input power to convert the input power into a preset driving power and supplying the driving power to a light emitting diode unit including at least one light emitting diode; a detecting unit receiving the driving power supplied to the light emitting diode unit to detect voltage flowing in the light emitting diode unit; a controlling unit comparing detection voltage detected by the detecting unit with a preset reference voltage to control a power conversion operation of the power supplying unit; and a driving unit driving the power conversion operation according to controlling by the controlling unit. | 10-03-2013 |
20140001973 | LIGHT EMITTING DIODE DRIVING APPARATUS | 01-02-2014 |
20140035473 | ILLUMINATION DRIVING APPARATUS FOR LIGHT EMITTING DIODE AND METHOD THEREOF - There is provided an illumination driving apparatus for a light emitting diode, the apparatus including: a light emitting unit including M number of light emitting diodes (LEDs) connected in series and driven by an output voltage rectified in a rectifying unit; an LED switch unit including N number of LED switches connected in parallel with at least N number of the M LEDs, respectively, and connected in series; an LED switch control signal generating unit comparing the output voltage of the rectifying unit with each of the first to Nth preset reference voltages to generate N number of LED switch control signals controlling the LED switch unit; and an LED switch controlling unit transferring the N number of LED switch control signals to the LED switch unit. | 02-06-2014 |
20140035476 | LIGHT EMITTING DIODE DRIVING APPARATUS - There is provided a light emitting diode driving apparatus capable of supplying a constant average current to a light emitting diode by generating a reference voltage used for driving the light emitting diode according to input power and a switching signal switching a path of a current supplied to the light emitting diode. The light emitting diode driving apparatus includes: a reference voltage generating unit generating a reference voltage set based on input power and a switching signal for supplying driving power to a light emitting diode; and a driving unit supplying the driving power to the light emitting diode according to the reference voltage. | 02-06-2014 |
20140091717 | APPARATUS FOR DRIVING LIGHT EMITTING DIODE - There is provided an apparatus for driving a light emitting diode (LED), capable of distributing current stress applied to the LED. The apparatus includes an LED part including a plurality of LED units respectively including at least one LED, the plurality of LED units being connected in parallel to a power input terminal to which rectified power in sine wave form is supplied, and, among the plurality of LED units connected in parallel, a termination end of the LED unit in a front end being connected to a middle of an adjacent LED unit; and a current source unit including a plurality of current sources respectively connected to termination ends of the plurality of LED units and allowing corresponding current to flow through the plurality of LED units. | 04-03-2014 |
20140368119 | LIGHT EMITTING DIODE LIGHTING APPARATUS AND DRIVING METHOD THEREOF - There is provide a light emitting diode lighting apparatus capable of being generally used in various kinds of dimmer, the apparatus including: a dimmer varying waveforms of input power according to a dimming signal; a bleeder adjusting a bleeding current under control; a controller comparing a latching current of the dimmer with the bleeding current of the bleeder to control the amount of the bleeding current; and an LED driver receiving a current other than the bleeding current flowing through the bleeder from among the currents from the dimmer to driver a light emitting diode (LED). | 12-18-2014 |
Patent application number | Description | Published |
20130076253 | LIGHT EMITTING DIODE DRIVING APPARATUS - Disclosed herein is a light emitting diode (LED) driving apparatus including: at least one energy storages connected in series with each other; a plurality of LEDs each connected in parallel with each of the energy storages; and a switching control unit selectively connecting the at least one energy storages according to a level of applied voltage to charge/discharge voltage in/from the selected energy storages and control driving of the LEDs by the charging/discharging operation. Therefore, it is possible to easily drive the LEDs without a converter. | 03-28-2013 |
20130162164 | PWM DRIVING CIRCUIT AND PWM DRIVING METHOD - Provided is a PWM driving circuit and a PWM driving method. The PWM driving circuit includes a dimmer switching unit turning on a first switch to apply a first reference signal varied according to an input voltage of a system when an output voltage level of a dimmer is a reference level or less, and turning on a second switch to apply a second reference signal, unrelated to the input voltage of the system, when the output voltage level of the dimmer is more than the reference level, an error amplification unit comparing the first reference signal or the second reference signal with an output detection signal to amplify an error and outputting an error amplification signal, and a PWM control signal generating unit comparing the error amplification signal of the error amplification unit with a predetermined reference waveform to output a PWM control signal. | 06-27-2013 |
20130169182 | PWM CONTROL CIRCUIT, FLYBACK CONVERTER AND METHOD FOR CONTROLLING PWM - Disclosed herein are a PWM control circuit, a flyback converter, and a PWM control method. The PWM control circuit includes: a peak storing and reference signal generating unit storing a peak value of one period of a feedback signal from a secondary side output and inverting the peak signal arid outputting the inverted peak signal as a reference signal; and a PWM control signal generating unit generating a PWM control signal by using an output obtained by comparing the reference signal with a reference waveform from the peak storing and reference signal generating unit. In addition, the flyback converter including the same and the method for controlling PWM are proposed. | 07-04-2013 |
20140001958 | CIRCUIT, DEVICE AND METHOD OF DIRECTLY DRIVING LED | 01-02-2014 |
20140001980 | CIRCUIT AND METHOD FOR DRIVING LED LIGHT | 01-02-2014 |
20140003098 | PWM CONTROL CIRCUIT FOR DC-DC CONVERTER, FLYBACK CONVERTER, AND METHOD OF CONTROLLING PWM OF DC-DC CONVERTER | 01-02-2014 |
20140184187 | AVERAGE CURRENT CONTROLLER, AVERAGE CURRENT CONTROL METHOD AND BUCK CONVERTER USING THE AVERAGE CURRENT CONTROLLER - The present invention relates to an average current controller, an average current control method and a buck converter using the average current controller. The average current controller includes a first comparator for generating a high H signal, a multivibrator for generating a TAVG pulse signal by receiving a high H signal outputted from the first comparator, a timing generator for generating a signal CH_ON to charge/discharge a capacitor by using at least the TAVG pulse signal, an integrator circuit unit for charging/discharging the capacitor, a second comparator for outputting a corresponding signal, an up/down counter for increasing or decreasing a counting value and a digital/analog converter for outputting by converting an output (digital signal) of the up/down counter into an analog signal. | 07-03-2014 |
20140184276 | GATE DRIVER - Disclosed herein is a gate driver. The gate driver according to an exemplary embodiment of the present invention includes: a first power switch sourcing current according to voltage applied by a voltage source; a second power switch connected with the first power switch in series and sinking current according to the voltage applied by the voltage source; and a speed booster receiving a voltage pulse from the outside to output peak current so as to make a turn on/off operation of the first power switch fast. As set forth above, according to the exemplary embodiments of the present invention, it is possible to improve the driving speed of the gate driver without increasing the current of the current source by further including the speed booster configured of the plurality of MOSFETs and the capacitor. | 07-03-2014 |
20140184307 | GATE DRIVER HAVING FUNCTION OF PREVENTING SHOOT-THROUGH CURRENT - Disclosed herein is a gate driver having a function of preventing shoot-through current. The gate driver having a function of preventing shoot-through current includes: a first power switch sourcing current according to voltage applied by a voltage source; a second power switch connected with the first power switch in series and sinking current according to voltage applied by the voltage source; and a shoot-through current preventing circuit preventing the occurrence of shoot-through current in first and second power switches at the time of driving of the first and second power switches. According to the present invention, the shoot-through current preventing circuit configured of the plurality of PMOSs and NMOSs can prevent the shoot-through current from occurring in the power transistor of the output terminal at the time of the driving of the gate driver, thereby preventing the unnecessary power consumption and the occurrence of ground noise. | 07-03-2014 |