Patent ID: 8284493

Claim:
A projection lens unit for a pico-projector which comprises a lens array, a color composition prism, a cover glass and an image panel, the projection lens unit characterized in that: the lens array includes 1 st to 6 th lenses sequentially arrayed from a screen on which an image is projected, the 1 st lens includes a stop side formed on a 1 st side of the 1 st lens, the stop side stops the passage of light, to perform the function of an aperture stop, light passing from the 1 st tens to the 6 th lens travels in only one direction of the lens sides based on the aperture stop, and parts of the lens sides through which the light does not pass are cut so that the whole height of the lens array is reduced, and wherein the full length from the 1 st side of the 1 st lens to a 2 nd side of the 6 th lens is 13 mm or less and two of the 1 st to 6 th lenses are aspherical lenses.