Patent ID: 8559096

Claim:
A reflective display pixel for modulating a return of incident visible light in at least one specified wavelength band, comprising: a cell to selectively return light in the at least one specified wavelength band, the cell comprising a fluid containing: a light absorbing medium to absorb the incident visible light in the at least one specified wavelength band and being substantially transparent to at least a portion of the incident visible light in any wavelength band outside the at least one specified wavelength band; a light returning medium to selectively return at least a portion of the incident visible light within the at least one specified wavelength band and being substantially transparent to at least a portion of the incident visible light in any wavelength band outside the at least one specified wavelength band; and where at least one of the light absorbing medium and the light returning medium is controllable to move up and down between positions within the fluid to adjust an amount of the incident visible light returned within the at least one specified wavelength band, the positions including a first position closer to a viewing surface of the cell, and a second position farther away from the viewing surface.