Patent ID: 6097366
Filing Date: 2000-08-01
Classification: G09G

Abstract:
An analog display interface apparatus adapted for driving a digital display unit by providing analog color signals to the digital display unit, such analog signals being converted to digital form upon receipt by the digital display unit, said interface apparatus comprising:a video memory means for storing a plurality of digital labels each for identifying a color which can be used for display and for outputting a digital label representing a color which has been selected for display;color palette mapping means for receiving the digital label from the video memory means and mapping the digital label to a digital representation of a color signal to be used for display; andmeans for converting into analog form the digital representation of the color signal to be used for display and providing the converted color signal in analog form to the digital display unit;wherein the analog interface apparatus also includes an updating means for updating the digital representations of color signals which are held in the color palette mapping means, the updating means including a look up table mapping means for receiving write commands containing new digital representations of color signals for updating the color palette mapping means and outputting corresponding digital representations of color signals to the color palette mapping means to update the digital representations of color signals which are held in the color palette mapping means; andwherein some of the values stored in the lookup table mapping means are received from the output of a calibration means which displays a plurality of color choices on the digital display unit so that a user can select one of the color choices for storing in the lookup table mapping means.