Patent ID: 6809717
Filing Date: 2004-10-26
Classification: G09G

Abstract:
A liquid crystal apparatus comprising:a liquid crystal device including a layer of liquid crystal, a pair of substrates disposed so as to contact and sandwich the liquid crystal, and a polarizer disposed on at least one of the pair of substrates, at least one of the pair of substrates being provided with an alignment film for aligning the liquid crystal in contact therewith, the pair of substrates respectively having formed thereon electrodes for applying a voltage to the liquid crystal thereby forming a matrix of pixels, a color light source provided proximate to one of the pair of substrates for emitting light to be optically modulated by the liquid crystal device; dividing means for dividing a full-color image frame period into a plurality of field periods and further dividing each field period into a plurality of sub-field periods; color changing means for changing a color of a light emitted from the color light source for each field period; and control means for controlling the color light source to be on during at least one sub-field period of the plurality of sub-field periods so as to effect a plurality of illuminating operations including at least a first operation for displaying a first image by turning on the color light source at a first illuminance in the at least one sub-field period in each field period and a second operation for displaying a second image substantially identical to the first image by turning on the color light source at a second illuminance in at least one other sub-field period in each field period, the first and second illuminances being non-zero and different from each other.