Patent ID: 8692618
Filing Date: 2014-04-08
Classification: G09G,H03F

Abstract:
1. A positive and negative voltage input operational amplifier of a source driver, for receiving a first power voltage, a second power voltage and a third power voltage, wherein the first power voltage is higher than the second power voltage, and the second power voltage is higher than the third power voltage, the positive and negative voltage input operational amplifier comprising: a positive operational amplifier, for receiving a first input signal and generating a first output signal, wherein the first input signal and the first output signal are respectively operated between the first power voltage and the second power voltage, wherein the positive operational amplifier further comprises: a negative operational amplifier, for receiving a second input signal and generating a second output signal, wherein the second input signal and the second output signal are respectively operated between the second power voltage and the third power voltage; and a switching unit selectively operated in a first status or a second status in order to control polarities of a first source signal and a second source signal, wherein when the switching unit is operated in the first status, the first output signal is switched to the first source signal and the second output signal is switched to the second source signal, otherwise when the switching unit is operated in the second status, the first output signal is switched to the second source signal and the second output signal is switched to the first source signal.