Patent ID: 7221346

Claim:
A driving circuit of a liquid crystal display device comprising: a timing controller outputting a polarity-inverting signal and at least one digital signal; a source driver; a low color scale driving circuit, wherein the low color scale driving circuit generates at least one analog signal and comprises: at least one buffer, receiving the polarity-inverting signal and said at least one digital signal outputted from the timing controller; and at least one set of transistors, coupled to an output terminal of the buffer for outputting said analog signal, wherein said set of transistors comprises a PMOS transistor and a NMOS transistor, a gate of the PMOS transistor and a gate of the NMOS transistor coupled to the output terminal of the buffer, a source of the PMOS transistor coupled to the drain of the NMOS transistor, a drain of the PMOS transistor coupled to a power voltage, a source of the NMOS transistor coupled to a ground voltage, the analog signal outputted through the source of the PMOS transistor and the drain of the NMOS transistor.