Patent ID: 8334819

Claim:
A display comprising: a) a first display subunit comprising a first plurality of light emitting elements, each light emitting element of said first plurality designed to emit light in a characteristic wavelength band; b) a second display subunit comprising a second plurality of light emitting elements, each light emitting element of said second plurality designed to emit light in a characteristic wavelength band; and c) an optical system configured to optically superimpose each light emitting element of said first plurality with a corresponding light emitting element of said second plurality designed to emit light in a like wavelength band; wherein each of said first and second display subunits comprises light emitting elements of at least two types, each type designed to emit light of a respective characteristic wavelength band, and wherein light emitting elements of said first display subunit are optically superimposed with light emitting elements of the same type in said second display subunit.