Projection display device

摘要

A projector 100 comprising a light source (130), a reflective light bulb (DMD 180), a projection optical system, an illumination optical system (120) that guides light emitted from the light source to the reflective light bulb, a stationary aperture (166), and a movable aperture (167).

主权项

1. A projection display device, comprising: a light source; a reflective light bulb including a reflective surface, the reflective light bulb configured to modulate fight emitted from the light source, and to produce an image; a projection optical system configured to output the image along a specific optical path, and to project the image onto a specific projection face; an illumination optical system configured to guide light emitted from the light source to the reflective light bulb; a stationary aperture provided inside of the illumination optical system, the stationary aperture configured to block a first portion of the light emitted from the light source; a movable aperture provided inside of the illumination optical system, the movable aperture configured to block a second portion of the light emitted from the light source; an optical axis being a center axis of the light emitted from the light source; a plane perpendicular to the optical axis; wherein the reflective surface receives a portion of the light emitted from the light source and reflects it as planar reflected light; the stationary aperture is disposed such that it blocks the planar reflected light from entering the projection optical system; the stationary aperture includes an arc portion disposed on the plane; and the arc portion blocks a portion of the planar reflected light of the light emitted from the light source; a first portion of the planar reflected light having a first incidence angle; a second portion of the planar reflected light having a second incidence angle; the first incidence angle being smaller than the second incidence angle; and wherein the arc portion blocks the first portion of the planar reflected light.