US Patent 7944604 Interferometric modulator in transmission mode

A transmissive micromechanical device includes a substrate, an optical stack over the substrate and a moveable membrane over the optical stack. The moveable membrane may include a partially reflective mirror and be configured to move from a first position to a second position. When the movable membrane is in the first position the transmissive micromechanical device is configured to pass light of a predetermined color and when the movable membrane is in the second position, the micromechanical device is configured to block substantially all of light incident on the substrate.