Patent ID: 8462298
Filing Date: 2013-06-11
Classification: G02B,G02F,H01L

Abstract:
1. A method of forming a full-color electronic display comprising the steps of: a) providing a broadband-emitting electronic display; b) providing a pigment mixture containing a single first pigment, a carrier for the pigment, and a dispersant; c) mixing the pigment mixture with rigid milling media having an average particle size less than 100 micrometers; d) introducing the mixture of step c) into a high-speed mill; e) milling the mixture until a pigment dispersion is obtained wherein at least 90 volume percent of the pigment particles have a particle size less than 100 nm; f) separating the milling media from the dispersion milled in step e); g) coating the resulting dispersion of the single first pigment onto portions of the electronic display to form areas of red filter layer which has a transmittance of 80% or more at a wavelength of 650 nm, no more than 10% at a wavelength of 585 nm and no more than 5% at all wavelengths from 580-410 nm; h) repeating steps b) through f) for a second pigment replacing the first pigment; i) repeating steps b) through f) for a third pigment replacing the first pigment; j) combining the dispersions of second and third pigments; k) coating the resulting dispersion onto portions of the electronic display to form areas of green filter layer; l) repeating steps b) through f) for a fourth pigment replacing the first pigment; m) repeating steps b) through f) for a fifth pigment replacing the first pigment; n) combining the dispersions of fourth and fifth pigments; and o) coating the resulting dispersion onto portions of the electronic display to form areas of blue filter layer.