A method for driving a pixel is provided. The method includes determining a first predetermined gray-level and a second predetermined gray-level which are corresponding to a target gray-level according to the target gray-level of the pixel, wherein an equivalent gray-level corresponding to the first predetermined gray-level and the second predetermined gray-level is equal to the target gray-level, thereafter, generating a first driving voltage and a second driving voltage according to the first predetermined gray-level and the second predetermined gray-level for respectively driving a first sub-pixel and a second sub-pixel within the pixel during a frame period. The first driving voltage is greater than the second driving voltage when the equivalent gray-level is small than a first setting gray-level; the first driving voltage is small than the second driving voltage when the equivalent gray-level is greater than the first setting gray-level.