Projection apparatus
AssigneeCoretronic Corporation
InventorsWei-Po Hsu, Chia-Lun Liu, Tai-Li Chang
Life of this patent
Estimating the term…
Abstract
A projection apparatus including an optical engine, a ring, a lens and multiple casings is provided. The optical engine is suitable for producing an image light beam to project an image onto a screen. The ring is fixed on the optical engine. The lens is disposed outside the optical engine and located at a transmission path of the image light beam. The casings are assembled to the ring and connected to each other to form a lens barrel for fixing the lens, and the lens is driven to move relative to the optical engine and the ring by the lens barrel. The projection apparatus has a smaller overall dimension.
Claims11
A projection apparatus, comprising:
- an optical engine suitable for producing an image light beam to project an image onto a screen;
- a ring fixed on the optical engine, wherein the ring comprises:
- an upper ring;
- and
- a lower ring connected to the upper ring;
- a lens disposed outside the optical engine and located at a transmission path of the image light beam;
- and
- a plurality of casings assembled to the ring, the casings being connected to each other to form a lens barrel having a lens-fixing groove for fixing the lens, and the lens being driven to move relative to the optical engine and the ring by the lens barrel.
Dependencies are inferred from the claim text.