Patent ID: 8081150

Claim:
An output buffer for a source driver of an LCD, comprising: an amplifier section amplifying an analog image signal and including a first current mirror circuit and a second current mirror circuit; an output section outputting a source line driving signal for driving a source line of the LCD through an output node in response to a signal amplified by the amplifier section; and a slew rate controller section, wherein the slew rate controller section comprises: a first capacitor connected between the output node of the output section and an output node of a first current mirror circuit; a second capacitor connected in parallel with the first capacitor and disconnected from the first capacitor when the source line driving signal supplied to the source line is initially activated; a third capacitor connected between the output node of the output section and an output node of the second current mirror circuit; and a fourth capacitor connected in parallel with the third capacitor and disconnected from the third capacitor when the source line driving signal supplied to the source line is initially activated.