Patent ID: 7701474
Filing Date: 2010-04-20
Classification: G09G

Abstract:
1. A circuit for driving a color liquid crystal display, comprising: a data latch for selectively inverting image display data based on a polarity signal; a gray scale voltage generating circuit for generating a first set of plural positive-polarity gray scale voltages and a second set of plural negative-polarity gray scale voltages; a polarity selecting circuit for selecting one of said first set of said plural positive-polarity gray scale voltages and said second set of said plural negative-polarity gray scale voltages based on said polarity signal; a gray scale voltage selecting circuit for selecting a single gray scale voltage from said selected plural gray scale voltages based on said image display data supplied from said data latch; an output circuit for supplying said selected single gray scale voltage to a corresponding data electrode of said color liquid crystal display; and a control circuit for inactivating said gray scale voltage generating circuit, said polarity selecting circuit, and said output circuit in a power saving mode, and also for applying voltages corresponding to highly significant bit signals of said image display data as display data signals to said data electrodes in said power saving mode.