A liquid crystal device is disclosed. The liquid crystal device includes a four-color converter, a data driver configured to process the RGBW information to be displayed to generate a simulated data signals, a scanning driver configured to generate scanning signals in sequence, and a display panel configured to display colors in accordance with the simulated data signals from the data driver and the scanning signals from the scanning driver. The four-color converter is configured to convert original RGB information to grayscale values for each color, to apply a white-balance process to the grayscale values for each color, to determine a maximum grayscale value and a minimum grayscale value among the grayscale values after the white-balance process, to generate two chromaticity values of a standard white color when the maximum grayscale value is not greater than a predetermined grayscale value, to calculate second grayscale values for each color in accordance with the two chromaticity values, to convert the minimum grayscale value to an outputted grayscale value of the white color to be displayed in the RGBW information, to calculate the outputted grayscale values for a red color, a green color, and a blue color within the RGBW information to be displayed in accordance with the second grayscale values and the outputted grayscale value of the white color.