Four color liquid crystal display and driving device and method thereof

A device of driving a four color liquid crystal display including a plurality of red, green, blue, and white pixels arranged in a matrix, the device comprising:

• a gray voltage generator generating a plurality of gray voltages;
• an image signal modifier for converting three-color image signals into four-color image signals and selecting one of the three-color image signals and the four-color image signals;
• and
• a data driver converting the selected image signals into data voltages selected from the gray voltages and applying the data voltage to the pixels.

A method of driving a four color liquid crystal display including a plurality of gate lines, a plurality of data lines, and a plurality of red, green, blue, and white pixels arranged in a matrix, the method comprising:

• converting three-color image signals into four-color image signals;
• selecting one of the three-color image signals and the four-color image signals;
• converting the selected image signals into data voltages;
• applying a gate voltage to the gate lines;
• and
• applying the data voltages into the data lines.

A display device comprising:

• a plurality of pixels having color pixels and a white pixel, each pixel including a pixel electrode and a switching element;
• and
• a black matrix enclosing the color pixels and the white pixels,
• wherein at least one portion of the black matrix enclosing the white pixel is wider than other portions of the black matrix enclosing the color pixels.