ILLUMINATING DEVICE AND PROJECTION TYPE IMAGE DISPLAY UNIT

摘要

An illuminating device (1) comprising a light source (12) consisting of LED chips (11) disposed in a array form and lens cells (14) each disposed on the light outgoing side of each LED chip (11), and a fly-eye lens pair (13) for integrating and guiding rays of light output from respective LED chips (11) and made parallel by the lens cells (14) to a liquid crystal display panel (3). The LED chips (11) and the lens cells (14) are formed in square shapes that match the aspect ratio of the liquid crystal display panel (3). The lens cells (14) are separated from each other and have a wall surface (air gap) that works as a reflection surface.