Abstract: A common voltage generation circuit includes a common voltage adjusting circuit adjusting a level of a common voltage in response to a compensation signal and providing the adjusted common voltage to a liquid crystal panel, and a common voltage compensating circuit including a resistor producing potential differences between the adjusted common voltage and each of the positive and negative polarity data voltages, a first voltage detector detecting a potential difference between the adjusted common voltage and the negative polarity data voltage, a second voltage detector detecting a potential difference between the adjusted common voltage and the positive polarity data voltage, and a voltage comparator comparing output signals of the first and second voltage detectors and feeding the compensation signal back to the common voltage adjusting circuit.

Abstract: A common voltage generation circuit includes a common voltage adjusting circuit adjusting a level of a common voltage in response to a compensation signal and providing the adjusted common voltage to a liquid crystal panel, and a common voltage compensating circuit including a resistor producing potential differences between the adjusted common voltage and each of the positive and negative polarity data voltages, a first voltage detector detecting a potential difference between the adjusted common voltage and the negative polarity data voltage, a second voltage detector detecting a potential difference between the adjusted common voltage and the positive polarity data voltage, and a voltage comparator comparing output signals of the first and second voltage detectors and feeding the compensation signal back to the common voltage adjusting circuit.

Abstract: A driving apparatus that can easily detect a failure occurring in a liquid crystal panel and a liquid crystal display comprising the driving apparatus for a display comprises a voltage generator generating first and second gate clock signals that are a combination of a gate-on signal and a gate-off signal, wherein the first and second gate clock signals control a turn-on/off condition of a gate line, and a signal comparator comparing the first gate clock signal and the second gate clock signal with each other and turning a timing controller for the display on or off according to a comparison result.

Abstract: A driving apparatus and a circuit for a display device are presented. The driving apparatus includes a plurality of pixels, a positive polarity reference gray voltage generator capable of generating a plurality of positive polarity reference gray voltages, and a data driver capable of generating a plurality of negative polarity reference gray voltages based on the positive polarity reference gray voltages. The data driver is also capable of generating a plurality of positive polarity gray voltages and a plurality of negative polarity gray voltages using the positive polarity reference gray voltages and the negative polarity reference gray voltages, respectively, and applying gray voltages to the pixels. The gray voltages correspond to external image signals and are selected from the positive and negative gray voltages. The invention simplifies the design of the driving apparatus and circuitry for a display device.