Patent ID: 8421002
Filing Date: 2013-04-16
Classification: G03B

Abstract:
1. An image projection apparatus that includes a projection unit that emits image light, a reflection mirror that reflects the image light emitted from the projection unit, and a screen on a rear surface of which the image light reflected by the reflection mirror is projected, the apparatus comprising: a dust-proof enclosure portion which stores therein an emission opening of the image light of the projection unit and an optical element of an emission portion airtightly and in which a projection window from which the image light is emitted is formed; and a cabinet shielding structure which holds the screen on a front side, in which a light introducing and managing opening which introduces the image light emitted from the projection window of the projection unit and from which cleaning of the projection window is possible is opened in a rear surface, and in which the reflection mirror that reflects the image light introduced from the light introducing and managing opening toward the rear surface of the screen is arranged, wherein a dust-proof cover is detachably attached to the light introducing and managing opening of the cabinet shielding structure, the projection window is exposed in a state where the dust-proof cover is removed, and the projection window is covered and a space in the cabinet shielding structure is sealed in a state where the dust-proof cover is attached.