Patent ID: 8100569

Claim:
An LED optical unit, comprising: a lens holder having a first portion and a frame extending from the first portion, the frame defining a first opening, a second opening and including an inner surface, the frame being located between the first opening and the second opening, tapering from the first opening towards the second opening so that the first opening and the second opening become substantially parallel with respect to each other, and the frame including at least one slit, at least one contact plate and at least one hook, the at least one slit being substantially cup-shaped, the at least one contact plate surrounded by the at least one slit and having an elasticity in an inner direction of the frame, and the at least one hook being located on the inner surface of the contact plate of the frame and being located adjacent the at least one slit; a base member having a front surface and a peripheral surface, the front surface being positioned substantially parallel to the first opening of the lens holder, the peripheral surface including a plurality of ribs that contact with the inner surface of the lens holder, and the plurality of ribs configured to attach the base member to the lens holder by locking at least one of the ribs with the at least one contact plate and the at least one hook in order to define an air flow space between the peripheral surface of the base member and the inner surface of the lens holder; a projector lens having an optical axis and a light incoming surface, and the projector lens attached to the lens holder so that the frame of the lens holder is located between the peripheral surface of the base member and the projector lens; and an LED light source having an optical axis and attached on the front surface of the base member so that the optical axis of the LED light source substantially aligns with the optical axis of the projector lens, wherein the LED light source is configured to be spaced from the light incoming surface of the projector lens at a prescribed interval.