US 2006/0077358 A1 · Projection Device Having Single Light Valve

Abstract

A projection device having single light valve has a light source, a projection lens, an imaging unit and a beam breaker. Moreover, the imaging unit has a color production device and a valve. When the beam provided by light source propagates to the color production device, the color production device converts the beam into several different color beams in an order. Thereafter, the beams propagate to the beam breaker, and the beam breaker breaks the beam propagating through within a definite time according to the states of imaging unit. Afterwards, the beams that are not broken are converted into images by the light valve in order, and projected on a screen by projection lens. The beam breaker module can enable the projection device having single light to have several situation modes, and maintain the imaging contrast.

Claims18

Dependent claims

A projection device having single light valve, suitable for projecting an image to a screen, the projection device comprising:

a light source, for providing a light beam;
a projection lens, disposed behind the light source, and located on a propagation path of the light beam;
an image unit, disposed between the light source and the projection lens, and located on the propagation path of the light beam, wherein the image unit comprises a color production device and a light valve disposed behind the color production device, and located on the propagation path of the light beam;
and
a beam breaker module, disposed between the light source and the screen, and the beam breaker module selectively cutting in or cutting out from the propagation path of the light beam, wherein when the beam breaker module is on the propagation path of the light beam, the beam breaker module block the passing light beam within a specific time period according to a state of the color production device.

2 more elements

Dependencies are inferred from the claim text.

Projection Device Having Single Light Valve

Life of this patent

Projection Device Having Single Light Valve

Life of this patent

Abstract

Claims18