Patent ID: 8672485

Claim:
An illuminating unit comprising: a light source which emits light; a uniformizing unit which uniformizes the light emitted from the light source, wherein the uniformizing unit comprises a plurality of uniformizing lenses arranged on an optical path; a condensing unit which condenses light emitted from the uniformizing unit to emit to a display element of a display apparatus, wherein the condensing unit comprises a plurality of condensing lenses sequentially arranged on the optical path, and wherein the uniformizing unit and the condensing unit are arranged to meet the following formula: 1.0<( D 2/ H 2)/( D 1/ H 1)≦1.4 wherein H 1 is a width of a cell lens of the uniformizing lenses, H 2 is a width of an image displayed in the display element, D 1 is a distance between a light incident surface initially arranged on the optical path and a light emission surface lastly arranged on the optical path among the plurality of uniformizing lenses, and D 2 is a distance between the light emission surface lastly arranged on the optical path among the plurality of uniformizing lenses and a light incident surface lastly arranged on the optical path among the plurality of condensing lenses.