Patent ID: 8179425

Claim:
A method of aligning display substrates comprising an array of pixels with component substrates comprising an array of optical components, the method comprising: forming a display motherglass with an array of panels each comprising an array of visible pixels sufficient for a single display substrate and with, in respect of each panel, a first alignment feature arranged outside the array of visible pixels and having a surface relief aligned with the array of pixels of the respective panel; dividing the display motherglass into display substrates each comprising an array of pixels and a first alignment feature; forming component substrates each with an array of optical components and a second alignment feature having a surface relief aligned with the array of optical components, the surface relief of the second alignment feature being shaped to register with the surface relief of the first alignment feature, wherein the surface relief of the second alignment feature repeats in the same direction in which the optical components repeat at a pitch substantially equal to the pitch of the optical components or an integer multiple of the pitch of the optical components; and attaching the display substrates to respective component substrates with the first and second alignment features in registration with each other.