Abstract: A flat panel display device may improve picture quality by compensating a panel defect by use of a circuit and a picture quality controlling method. A flat panel display device includes a display panel.A memory stores a location information and a compensation value for a panel defect location on the display panel. A first converter calculates a brightness and color difference signals from red, green, blue video signals to be displayed in the display panel. The first converter expands the number of data bits of the brightness signal to generate the expanded brightness signal. A compensating part generates a compensated brightness signal by increasing or decreasing the expanded brightness signal of the video signal to be displayed in the panel defect location. A second converter calculates the red, green, blue signals from the color difference signal and the compensated brightness signal, and generates the compensated video signal by reducing the number of bits of the calculated red, green, blue signals.

Abstract: A flat panel display device includes a display panel, a memory storing a compensation value that corresponds to a panel defect location, the panel defect location being where any one of a brightness and a color difference exists compared to other part of the display panel, a compensating unit to adjust image data to be displayed in the panel defect location using the compensation value, and a driver to apply the adjusted image data from the compensating unit to the display panel.

Abstract: A driving circuit of a display device includes a timing controller for combining p first digital data signals (p being a positive integer greater than 1) corresponding to colors for displaying images to generate q second digital data signals and for supplying the q second digital data signals to first to qth data transmission lines (q being a positive integer smaller than p), and a plurality of data driver integrated circuits for processing the q second digital data signals from the timing controller to restore the p first digital data signals, converting the p restored digital data signals into analog data signals, and supplying the analog data signals to a display panel.

Abstract: A circuit for driving a liquid crystal display device, as embodied, includes: a gray level voltage generator for generating a plurality of gray level voltages; and an intermediate gray level voltage generator for receiving a first gray level voltage and a second gray level voltage among the plurality of gray level voltages and for selectively outputting one of the first gray level voltage and a third gray level voltage through a plurality of capacitors, a value of the third gray level voltage being between the first and second gray level voltage and set by the plurality of capacitors, the intermediate gray level voltage generator including: an operational amplifier for pre-charging the plurality of capacitors using a current outputted from the operational amplifier and for selectively outputting one of the first gray level voltage and the third gray level voltage.

Abstract: An apparatus and method for driving an image display device is disclosed, in which data signals are transmitted in a multilevel to reduce transmission frequencies, power consumption and transmission lines. The apparatus for driving an image display device includes a display panel including an image display unit for displaying images, a plurality of data driver integrated circuits supplying image signals to the image display unit, and a timing controller converting externally supplied i bit digital source data (i is a positive number) to a plurality of voltage levels to supply the converted voltage levels to the respective data driver integrated circuits and controlling the data driver integrated circuits.

Abstract: A driving apparatus of a liquid crystal display device includes a liquid crystal display panel display a video signal by use of a liquid crystal cell of a matrix shape. A plurality of data drive circuits generate a polarity pattern of the video signal in accordance with a polarity signal and supply the polarity pattern to the liquid crystal cell through a plurality of output channels. A polarity controller controls the polarity signal and supplies the polarity signal to the data drive circuits on the basis of a first selection signal corresponding to the number of the output channels of one drive circuit and a second selection signal corresponding to a repetition period of the polarity pattern.

Abstract: A driving apparatus of a liquid crystal display device according to an embodiment of the present invention includes a liquid crystal display panel having a liquid crystal cell of a matrix shape to display a video signal; N (where N is a positive integer) number of data drive circuits that generate a polarity pattern of the video signal and supply it to the liquid crystal cell through a plurality of output channels; and a polarity controller that controls the polarity signal and supplies it to the N number of the data drive circuits on the basis of a first selection signal corresponding to the number of the output channels and a second selection signal corresponding to a repetition period of the polarity pattern.

Abstract: A method and apparatus for driving a liquid crystal display improves a picture quality displayed by a liquid crystal display. A brightness adjuster adjusts a brightness component of input video data and a brightness controller returns the adjusted brightness component to the brightness adjuster when the a value of the adjusted brightness component is outside a predetermined brightness reference range until the brightness adjuster produces a brightness component that is within the predetermined brightness reference range.

Abstract: A driving system for a liquid crystal display includes an analog driving circuit unit, a digital analog converter and a digital interface unit. The digital analog converter supplies an analog voltage for operating the analog driving circuit unit. The digital interface unit supplies a digital signal to the digital analog converter. The analog driving circuit units, the digital analog converter and the digital interface unit may be mounted on a single chip.

Abstract: An apparatus and a method of driving a liquid crystal display device include receiving gamma-treated data, performing a reverse gamma correction of the data, the reverse-gamma-corrected data having a first linear characteristic, performing a signal processing of the reverse-gamma-corrected data having the first linear characteristic, performing a gamma correction of the processed data, and generating data signals based on the gamma-corrected data using analog voltage values, the data signals having a second linear characteristic.

Abstract: A driving method and apparatus for a liquid crystal display uses a comparison between the previous frame and the current frame to expand the contrast ratio and reduce the manufacturing cost. A limited amount of data from the current image may be used: either using a limited area of the image or merely the amount of green in the overall image or the limited area. In the apparatus, an image signal modulator expands the contrast of the input data when the previous image is analogous to the current image to thereby generate output data. A timing controller re-arranges the output data to apply the output data to a data driver.