Patent ID: 9330624
Filing Date: 2016-05-03
CPC Classification: G02F,G09G,H03F,H04N

Claim Text:
1. A method of driving a display that uses a common voltage, the method comprising: alternately adjusting a common voltage amplifier output between a first gain during a first portion of a first half period, thereby driving the common voltage amplifier output to or near the value of a first power supply rail voltage and a second gain during a second portion of the first half period, wherein the common voltage amplifier output settles to a predetermined common voltage at an end of the first half period, driving the common voltage amplifier output during a first portion of a second half period to or near the value of a second power supply rail voltage according to the first gain so as to reduce a voltage drop from the respective power supply rail to the output voltage across an output stage of the common voltage amplifier, and driving the common voltage amplifier according the second gain during a second portion of the second half period, wherein the common voltage amplifier output settles to a predetermined common voltage at an end of the second half period, wherein the second gain is less than the first gain.