Patent ID: 7897986

Claim:
A microlens array, comprising: a base layer; a plurality of first microlenses with a first height formed over a first region of the base layer; a plurality of second microlenses with a second height lower than the first height formed over a second region of the base layer, wherein the second region surrounds the first region; and a plurality of third microlenses with a third height lower than the first and second heights formed over a third region of the base layer, wherein the third region surrounds the second and first regions, wherein the first region comprises a first sub-region and a second sub-region, the first sub-region of the first region comprises only the first microlenses, and the second sub-region of the first region is adjacent to the second region and surrounds the first sub-region of the first region, and the second sub-region of the first region comprises at least one of the second microlenses.