Patent ID: 7868864

Claim:
A display apparatus, comprising: a gray-scale circuit to receive pixel data to generate a first set of gray-scale voltages based on a first set of reference voltages in accordance with the pixel data, and to generate one or more second gray-scale voltages, said one or more second gray-scale voltages based on second, different one or more reference voltages, wherein the gray-scale circuit comprises: reference voltage circuitry to output the first set of reference voltages, and a plurality of switches that when in a first state cause production of the first set of gray-scale voltages based on the first set of reference voltages, and when in a second state cause production of the second one or more reference voltages; and a liquid crystal panel to receive the first set of gray-scale voltages during a first time period to show a plurality of different gray-scale levels and to receive the one or more second gray-scale voltages during a second time period to show a common gray-scale level.