Patent application number | Description | Published |
20090015601 | Liquid crystal display device and driving method thereof - Provided is an LCD device. The LCD device includes: an input unit, a backlight unit, a histogram analyzing unit, a data correcting unit, a liquid crystal panel driving unit, a duty ratio determining unit, and a lamp driving unit. The input unit inputs data corresponding to an image displayed on a liquid crystal panel, and the backlight unit includes a plurality of lamps. The histogram analyzing unit analyzes a histogram of data input from the input unit to generate a select signal according to a brightness state of the data. The data correcting unit corrects pixel data to be supplied to the liquid crystal panel using at least one of a plurality of gamma compensating characteristic curves. The liquid crystal panel driving unit drives the liquid crystal panel. The duty ratio determining unit generates a plurality of lamp-on signals. The lamp driving unit generates a lamp driving voltage corresponding to the lamp-on signal. | 01-15-2009 |
20100277518 | METHOD AND APPARATUS FOR DRIVING LIQUID CRYSTAL DISPLAY DEVICE - A method of driving a liquid crystal display device includes extracting brightness components of a portion of the first data for a current frame, arranging the brightness components for the current frame into a brightness histogram, retrieving brightness histograms for at least two frames prior to the current frame to generate an average histogram, generating second data for the current frame based on the average histogram, comparing the histogram for the current frame with the average histogram to determine whether an image at the current frame is a moving image or a still image, and driving the liquid crystal display device in accordance with one of the first data and the second data based on the comparison result. | 11-04-2010 |
20120105513 | LIQUID CRYSTAL DISPLAY DEVICE FOR COMPENSATING A PIXEL DATA IN ACCORDANCE WITH AREAS OF A LIQUID CRYSTAL DISPLAY PANEL AND SUB-FRAMES, AND DRIVING METHOD THEREOF - A liquid crystal display device includes a liquid crystal panel, a timing controller, a compensation unit and a panel drive circuit. The liquid crystal panel has a plurality of color pixels, each of the color pixels including two sub-pixels which represent two different colors. The timing controller generates a sub-pixel data stream of two sub-frame format. The sub-pixel data stream of two sub-frame format includes a first sub-pixel data for a first sub-frame and a second sub-pixel data for a second sub-frame. The first sub-pixel data and the second sub-pixel data have different gamma characteristics. The compensation unit is operable to compensate the first sub-pixel data and the second sub-pixel data with different rates. The panel drive circuit drives the sub-pixels on the liquid crystal panel and supplies the sub-pixels with the compensated first sub-pixel data for the first sub-frame and the compensated second sub-pixel data for the second sub-frame. | 05-03-2012 |
Patent application number | Description | Published |
20100149087 | DETACHABLE LIQUID CRYSTAL DISPLAY DEVICE - A detachable liquid crystal display device includes a liquid crystal module and a cradle. The liquid crystal module includes a liquid crystal panel, an optical sheet provided on a rear surface of the liquid crystal panel, an interface disposed on a rear surface of the liquid crystal panel, a power receiver disposed on the rear surface of the liquid crystal panel, a memory card and a timing controller for receiving second image data from external devices and permitting the first image data stored in the memory card to be displayed in the liquid crystal panel. The cradle includes a lamp emitting light, an inverter for supplying alternating current to the lamp, a connector for receiving third image data from external equipment, and an interface converter for applying the third image data to the interface of the liquid crystal module. | 06-17-2010 |
20100149417 | DETACHABLE LIQUID CRYSTAL DISPLAY DEVICE - A detachable liquid crystal display device includes a liquid crystal module and a cradle. The liquid crystal module includes a liquid crystal panel, an optical sheet provided on a rear surface of the liquid crystal panel, an interface disposed on a rear surface of the liquid crystal panel, a power receiver disposed on the rear surface of the liquid crystal panel, a memory card and a timing controller for receiving second image data from external devices and permitting the first image data stored in the memory card to be displayed in the liquid crystal panel. The cradle includes a lamp emitting light, an inverter for supplying alternating current to the lamp, a connector for receiving third image data from external equipment, and an interface converter for applying the third image data to the interface of the liquid crystal module. | 06-17-2010 |
Patent application number | Description | Published |
20130063395 | TOUCH CONTROLLERS, METHODS THEREOF, AND DEVICES HAVING THE TOUCH CONTROLLERS - An operating method of a touch controller includes receiving a plurality of currents through a plurality of channels, respectively, sensing a first current among the plurality of currents and extracting the sensed first current as a first control current and converting a charge corresponding to a difference between the first control current and a second current among the plurality of currents into an output voltage. | 03-14-2013 |
20130063396 | TOUCH SCREEN SENSOR INTEGRATED CIRCUITS, METHODS OF OPERATING THE SAME, AND SYSTEMS HAVING THE TOUCH SCREEN SENSOR INTEGRATED CIRCUITS - At least one example embodiment discloses a sensor circuit capable of processing a second input signal received via a sensing line by using a demodulation path for performing a demodulation operation or processing the second input signal by using a non-demodulation path that does not perform the demodulation operation, according to a level of a first input signal, for example, a noise signal, received via the sensing line. | 03-14-2013 |
20140240256 | DIGITAL FILTER, TOUCH SENSE DEVICE INCLUDING THE DIGITAL FILTER, AND METHOD FOR PERFORMING THE DIGITAL FILTERING - A touch sensing device including digital filter is provided. The touch sensing device includes a touch panel and a touch sensor configured to sensing a touch through the touch panel. The touch sensor includes a plurality of sensing units connected to the touch panel through a plurality of sensing lines. Each of the plurality of sensing units includes a digital filter configured to generate a valid filtered value at a time and invalid filtered value at other times by performing an operation on a plurality of input digital samples and a plurality of filter coefficients. | 08-28-2014 |
20140240278 | OPERATIONAL AMPLIFIER AND TOUCH SENSING APPARATUS INCLUDING THE SAME - A touch sensing apparatus is provided. The touch sensing apparatus includes a touch panel and a touch sensor configured to control the touch panel and sense a touch through the touch panel. The touch sensor includes a plurality of sensing units connected to the touch panel through a plurality of sensing lines respectively. Each of the plurality of sensing units includes at least an operational amplifier whose polarity varies in response to a clock signal. | 08-28-2014 |
20140253496 | CAPACITIVE TOUCH SYSTEM WITH IMPROVED TOUCH SENSING PRECISION AND COORDINATE EXTRACTION METHOD THEREOF - The inventive concept discloses a capacitive touch system and a coordinate extraction method thereof. The coordinate extraction method has operations of phases 1 and 2. | 09-11-2014 |
20150102827 | TOUCH SCREEN SENSOR INTEGRATED CIRCUIT, A METHOD OF OPERATING THE SAME, AND A SYSTEM INCLUDING THE SAME - A method of operating a touch screen sensor integrated circuit includes: receiving a plurality of current signals through a plurality of pins, wherein each current signal is generated according to mutual capacitance in response to a modulation signal; sensing the current signals and generating a plurality of sensed current signals corresponding to each of the current signals; and generating a plurality of subtracted current signals, wherein each subtracted current signal is generated by performing a subtraction on sensed current signals corresponding to a pair of the pins. | 04-16-2015 |
20150138145 | TOUCH SCREEN CONTROLLER TO GENERATE SINGLE-ENDED TOUCH SIGNAL, AND TOUCH SCREEN SYSTEM AND DISPLAY APPARATUS INCLUDING THE SAME - A touch screen controller, a touch screen system, and a display apparatus including the same includes a touch data generator that supplies a first transmission signal to a first sensing line, supplies a second transmission signal to a second sensing line adjacent to the first sensing line, receives differential touch signals from the first and second sensing lines, and performs an arithmetic operation on the differential touch signals to generate a single-ended touch signal, and a control logic that calculates touch coordinates by using the single-ended touch signal from the touch data generator. At least one of phases and frequencies of the first and second transmission signals have different values. | 05-21-2015 |