US Patent 7483197 - Multicolor micromirror display

http://www.freepatentsonline.com/7483197.html

This patent originally from IDC (acquired by Qualcomm for mobile device displays) has very early priority going back to 1994 and includes basic claims to four color interferometric micromirror displays. Claim 1 reads:

1. A device for displaying an image, comprising:

a plurality of interferometric modulators, said plurality of interferometric modulators comprising:

at least one interferometric modulator configured to output red light;

at least one interferometric modulator configured to output green light;

at least one interferometric modulator configured to output blue light; and

at least one interferometric modulator configured to output white light.