Patent ID: 7633509

Claim:
A liquid crystal display (LCD), comprising: an LCD panel comprising a red pixel, a green pixel and a blue pixel; a gray level converting unit, for receiving and converting an original red data signal, an original green data signal and an original blue data signal into a red data signal, a green data signal and a blue data signal, wherein when the original red data signal, the original green data signal and the original blue data signal all correspond to a specific gray level, the value of the blue data signal is lower than the value of the red data signal as well as the value of the green data signal; and a driving unit applied for receiving the red data signal, the green data signal and the blue data signal and outputting a red voltage signal, a green voltage signal and a blue voltage signal to drive the red pixel, the green pixel and the blue pixel respectively; wherein when the original red data signal, the original green data signal and the original blue data signal all correspond to the specific gray level, the difference of pixel luminance between the blue pixel corresponding to the blue data signal and the red pixel corresponding to the red data signal is lower than the difference of pixel luminance between the blue pixel corresponding to the original blue data signal and the red pixel corresponding to the original data signal, and the difference of pixel luminance between the blue pixel corresponding to the blue data signal and the green pixel corresponding to the green data signal is lower than the difference of pixel luminance between the blue pixel corresponding to the original blue data signal and the green pixel corresponding to the original green data signal.