Patent ID: 8767139

Claim:
A method of forming an optical element for a color display device, the method comprising: forming a lens shaped die from a first die material; coating a low refractive index photo-setting resin on the lens shaped die; pasting the lens shaped die to a substrate; irradiating the coated low refractive index photo-setting resin so as to set the low refractive index resin on a surface of the substrate and form a low refractive index layer; removing the lens shaped die from the low refractive index layer set on the substrate; coating a high refractive index photo-setting resin on the low refractive index layer by use of a planarizing die; irradiating the coated high refractive index photo-setting resin so as to set the high refractive index resin and form a high refractive index layer; and removing the planarizing die from the high refractive index layer set on the low refractive index layer; wherein the high refractive index layer and the low refractive index layer have different shapes for each of sub-pixels corresponding to respective colors of red (R), green (G) and blue (B), and wherein an uppermost portion of the high refractive index layer for each of the R, G and B sub-pixels has a curved shape.