A driving unit comprises a first multiplexer, a second multiplexer, and a plurality of control terminals. The first multiplexer and the second multiplexer individually include an input and a plurality of outputs. Each of the inputs is configured to receive a first polar signal and a second polar signal. Each of the outputs individually couples to one of a plurality odd sub-pixel regions and one of a plurality of even sub-pixel regions. Each of the control terminals receives a control signal so that the first multiplexer and the second multiplexer individually outputs the first polar signal and the second polar signal to one odd sub-pixel region and one even sub-pixel region according to the control signal.