Patent ID: 9373298
Filing Date: 2016-06-21
CPC Classification: G09G

Claim Text:
1. A display device comprising: a signal controller processing an input image signal and an input control signal and outputting an image signal and a control signal, wherein the control signal includes a selection signal for selecting when a black data voltage corresponding to a black image is to be displayed; and a data driver comprising a digital-analog converter converting the image signal to an analog data voltage based on gray voltages, a buffer including a first amplifier and a second amplifier, a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch is connected between the digital-analog converter and an input terminal of the first amplifier, the second switch is connected between the digital-analog converter and an input terminal of the second amplifier, the third switch is connected between a common voltage terminal and the input terminal of the first amplifier, and the fourth switch is connected between the common voltage terminal and the input terminal of the first amplifier, wherein the first, second, third, and fourth switches are controlled by the selection signal or an inverted signal of the selection signal, wherein when the selection signal is in a first level, the analog data voltage is input to the input terminal of the first amplifier via the first switch or input to the input terminal of the second amplifier via the second switch, wherein when the selection signal is in a second level, which is different from the first level, the common voltage is input to the input terminal of the first amplifier via the third switch or input to the input terminal of the second amplifier via the fourth switch, to display a black image, and wherein a value of the common voltage is not dependent upon the gray voltages.