ILLUMINATOR AND PROJECTION TYPE DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an illuminator and a projection type display device which are small and lightweight.

SOLUTION: The illuminator being used in this projection type display device 1 is provided with: an LED array 2 emitting color rays of light having different colors; and a uniformly illuminating means which uniformizes illuminance of incident rays of light from the LED array and emits them. The uniformly illuminating means has a function for narrowing angular distribution of incident rays of light and also for uniformizing illuminance distribution of the incident rays of light and is constituted of a rod lens array 3 in which a plurality of rod lenses 8 each having a diffraction grating at both sides of an incident end face and an exiting end face are arranged in a flat surface shape or in a curved surface shape.

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