Patent ID: 6864908

Claim:
A printhead for genration of a set of points of an image from plural arrays of printing elements, the image being composed of rows of said image points, comprising: a substrate extending in a direction parallel to a row of an image to be imprinted by the printhead on an image receiving surface, plural arrays of light-emiting printing elements disposed on said substrate wherein said plural arrays extend in said direction, and driver circuitry disposed on said substrate for activating individual ones of said printing elements to emit light for imprinting points of said image on said image receiving surface; an optical element for focussing light of said printing elements onto said row of said image, said focussing being accomplished for individual ones of said printing elements located in a first of said arrays and in a second of said arrays arranged alongside said first array; and wherein a pitch of the printing elements in said first array of printing elements is greater than the pitch of the printing elements in said second array of printing elements to permit formation of latent images by individual ones of said arrays of which a resolution of a first latent image is higher than a resolution of a second latent image.