Multi-projection system using a single illumination source and a single imaging device

摘要

A projection apparatus for projecting a first image and a second image is disclosed. The projection apparatus has a casing, a light source module providing an illumination beam, a light valve device, a first prism, a second prism, a third prism, a fourth prism, a first projection lens, and a second projection lens. The illumination beam enters the first prism, the second prism, the third prism, the fourth prism, and the light valve device. The illumination beam is reflected and converted into a first image beam and a second image beam. The first image beam enters the first prism and is totally reflected to the first projection lens to form the first image. The second image beam enters the third prism and is totally reflected to the second projection lens to form the second image.

主权项

1. A projection apparatus, comprising:
a light source module for providing an illumination light beam; a light valve device located on a transmission path of the illumination light beam and having at least a first zone and a second zone; a first interface, a first part of the illumination light beam passing through the first interface to reach the first zone of the light valve device and being reflected by the first zone to form a first image beam, and the first image beam being reflected by the first interface to propagate in a first direction, wherein the light source module and the light valve device are disposed on two opposite sides of the first interface; a second interface, a second part of the illumination light beam passing through the second interface to reach the second zone of the light valve device and being reflected by the second zone to form a second image beam, and the second image beam being reflected by the second interface to propagate in a second direction, wherein the light source module and the light valve device are disposed on two opposite sides of the second interface, the first interface and the second interface together are defined by multiple prisms, the second direction is different to the first direction, and the second interface is not parallel to the first interface; a first projection lens for receiving the first image beam reflected by the first interface and propagating in the first direction to form a first image; and a second projection lens for receiving the second image beam reflected by the second interface and propagating in the second direction to form a second image.