Patent ID: 8711168

Claim:
A method for processing light to present a color image, the method comprising: (a) applying a first optical filter having two or more passbands to light in three or more subbands of visible-light spectrum, wherein: the subbands establish a reference color gamut representing a range of colors, and each passband in the first optical filter overlaps at least a portion of at least one of the subbands but does not include all wavelengths in all of the three or more subbands; (b) applying a second optical filter having two or more passbands to light in the three or more subbands, wherein: the passbands of the first optical filter differ from the passbands of the second optical filter, the passbands of the first optical filter collectively overlap the passbands of the second optical filter by an amount that exceeds fifty percent, and each passband in the second optical filter overlaps at least a portion of at least one of the subbands but does not include all wavelengths in all of the three or more subbands; (c) modulating the light carried in the three or more subbands in response to an input signal to generate modulated color components of the color image in a first color gamut and in a second color gamut, wherein: the first color gamut differs from the reference color gamut and defines a range of colors capable of being presented by the light in the three or more subbands as filtered by the first optical filter, and the second color gamut differs from the first color gamut, differs from the reference color gamut and defines a range of colors capable of being presented by the light in the three or more subbands as filtered by the second optical filter; and (d) presenting the modulated color components in the first color gamut and the second color gamut to present the color image with a range of colors in an expanded color gamut that is larger than the reference color gamut.