Projection display using dedicated color pixels

Abstract

A projection display system may use a microdisplay that has pixels that are dedicated to only one narrow wavelength band. A suitable optical filter for each primary display color may be formed from a small number of optical layers, taking advantage of both the rounded profile and narrow range of the emission peaks in a typical projection light source. Thus, groups of pixels may be dedicated to each wavelength band of the display. A planarization layer may be coated on dichroic filter elements that are applied to a cover glass to provide the dedicated wavelengths for each pixel. The planarization layer may smooth out any surface irregularities resulting from the deposition of the dichroic layers on the cover glass.

Dependencies are inferred from the claim text.